28923864 has 32 divisors (see below), whose sum is σ = 73993920. Its totient is φ = 9416736.

The previous prime is 28923859. The next prime is 28923877. The reversal of 28923864 is 46832982.

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, 12982 + ... + 15045.

It is an arithmetic number, because the mean of its divisors is an integer number (2312310).

Almost surely, 2^28923864 is an apocalyptic number.

28923864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28923864 is an abundant number, since it is smaller than the sum of its proper divisors (45070056).

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

28923864 is a wasteful number, since it uses less digits than its factorization.

28923864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28079 (or 28075 counting only the distinct ones).

The product of its digits is 165888, while the sum is 42.

The square root of 28923864 is about 5378.0911111657. The cubic root of 28923864 is about 306.9625803649.

The spelling of 28923864 in words is "twenty-eight million, nine hundred twenty-three thousand, eight hundred sixty-four".