28287512 has 16 divisors (see below), whose sum is σ = 57861000. Its totient is φ = 12857920.

The previous prime is 28287503. The next prime is 28287521. The reversal of 28287512 is 21578282.

It is an interprime number because it is at equal distance from previous prime (28287503) and next prime (28287521).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160637 + ... + 160812.

Almost surely, 2^28287512 is an apocalyptic number.

28287512 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28287512 is an abundant number, since it is smaller than the sum of its proper divisors (29573488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28287512 is a wasteful number, since it uses less digits than its factorization.

28287512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321466 (or 321462 counting only the distinct ones).

The product of its digits is 17920, while the sum is 35.

The square root of 28287512 is about 5318.6005678186. The cubic root of 28287512 is about 304.6947119941.

The spelling of 28287512 in words is "twenty-eight million, two hundred eighty-seven thousand, five hundred twelve".