428 on Everything

The numerological meaning of the number 428, among other things, is an expression of a personal sense of freedom.

The number 428 is in high resonance with your destiny (name number) and life path (birth date number), which for both is the number 5. Although it has other meanings, the energy represented by the number 5 includes expression of a personal sense of freedom.

The energy represented by the number 5 is likely to have a lot of influence on the person you are and the events that occur as you live life.

To address your question:

A person sees many numbers during their daily living of life. But only a few are remembered. Although intellectually the person knows they've seen many numbers, emotionally or experientially only the numbers that are remembered are numbers that have been seen.

Probably the reason you started seeing the number is because the number represents your birthday. The number has personal meaning associated with it and you remembered seeing it.

Then you see it again. And again.

The Why People See Certain Numbers All the Time article describes why that is. In essence, when a person wonders if seeing a certain number has personal significance, a mental mystery is created. The mystery ensures that the subconscious will try to bring your conscious attention to the number whenever it's available in your environment to be seen.

When a person looks for synchronicity and coincidences, they almost always will find them. Searches that don't reveal coincidence are forgotten or outright dismissed. But coincidences found are remembered. Thus, it seems that there is so very much coincidence.

Sometimes things will seem to be a coincidence when they really aren't. Or they are but aren't as personal as a person may have thought. As an example, everybody born during the year you were born will have a birthday next year, their 28th birthday, on the same day of the week as their day of birth. Which of course includes everybody born on the 28th of any month of that year.