28685924 has 12 divisors (see below), whose sum is σ = 50502144. Its totient is φ = 14256744.

The previous prime is 28685911. The next prime is 28685929. The reversal of 28685924 is 42958682.

It is not an unprimeable number, because it can be changed into a prime (28685929) 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, 20804 + ... + 22139.

It is an arithmetic number, because the mean of its divisors is an integer number (4208512).

Almost surely, 2^28685924 is an apocalyptic number.

It is an amenable number.

28685924 is a deficient number, since it is larger than the sum of its proper divisors (21816220).

28685924 is a wasteful number, since it uses less digits than its factorization.

28685924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43114 (or 43112 counting only the distinct ones).

The product of its digits is 276480, while the sum is 44.

The square root of 28685924 is about 5355.9241966256. The cubic root of 28685924 is about 306.1185267124.

The spelling of 28685924 in words is "twenty-eight million, six hundred eighty-five thousand, nine hundred twenty-four".