28156924 has 24 divisors (see below), whose sum is σ = 50425200. Its totient is φ = 13752960.

The previous prime is 28156871. The next prime is 28156927. The reversal of 28156924 is 42965182.

It is a hoax number, since the sum of its digits (37) 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 (28156927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53784 + ... + 54304.

It is an arithmetic number, because the mean of its divisors is an integer number (2101050).

Almost surely, 2^28156924 is an apocalyptic number.

It is an amenable number.

28156924 is a deficient number, since it is larger than the sum of its proper divisors (22268276).

28156924 is a wasteful number, since it uses less digits than its factorization.

28156924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813 (or 811 counting only the distinct ones).

The product of its digits is 34560, while the sum is 37.

The square root of 28156924 is about 5306.3098288735. The cubic root of 28156924 is about 304.2251189180.

The spelling of 28156924 in words is "twenty-eight million, one hundred fifty-six thousand, nine hundred twenty-four".