28866512 has 20 divisors (see below), whose sum is σ = 57441636. Its totient is φ = 14042880.

The previous prime is 28866511. The next prime is 28866533. The reversal of 28866512 is 21566882.

It can be written as a sum of positive squares in 2 ways, for example, as 27081616 + 1784896 = 5204^2 + 1336^2 .

It is a super-2 number, since 2×28866512² = 1666551030092288, which contains 22 as substring.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28866511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23789 + ... + 24972.

Almost surely, 2^28866512 is an apocalyptic number.

It is an amenable number.

28866512 is a deficient number, since it is larger than the sum of its proper divisors (28575124).

28866512 is a wasteful number, since it uses less digits than its factorization.

28866512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48806 (or 48800 counting only the distinct ones).

The product of its digits is 46080, while the sum is 38.

The square root of 28866512 is about 5372.7564620035. The cubic root of 28866512 is about 306.7595580811.

The spelling of 28866512 in words is "twenty-eight million, eight hundred sixty-six thousand, five hundred twelve".