28933872 has 40 divisors (see below), whose sum is σ = 81542400. Its totient is φ = 8767680.

The previous prime is 28933867. The next prime is 28933939. The reversal of 28933872 is 27833982.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26872 + ... + 27927.

It is an arithmetic number, because the mean of its divisors is an integer number (2038560).

Almost surely, 2^28933872 is an apocalyptic number.

28933872 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28933872 is an abundant number, since it is smaller than the sum of its proper divisors (52608528).

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

28933872 is a wasteful number, since it uses less digits than its factorization.

28933872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54821 (or 54815 counting only the distinct ones).

The product of its digits is 145152, while the sum is 42.

The square root of 28933872 is about 5379.0214723498. The cubic root of 28933872 is about 306.9979805135.

The spelling of 28933872 in words is "twenty-eight million, nine hundred thirty-three thousand, eight hundred seventy-two".