It is a happy number.
It is a de Polignac number, because none of the positive numbers 2k-28666975 is a prime.
It is a congruent number.
It is an unprimeable number.
Almost surely, 228666975 is an apocalyptic number.
28666975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.
28666975 is a wasteful number, since it uses less digits than its factorization.
28666975 is an evil number, because the sum of its binary digits is even.
The square root of 28666975 is about 5354.1549286512. The cubic root of 28666975 is about 306.0511078433.
The spelling of 28666975 in words is "twenty-eight million, six hundred sixty-six thousand, nine hundred seventy-five".