28624864 has 12 divisors (see below), whose sum is σ = 56355264. Its totient is φ = 14312416.

The previous prime is 28624861. The next prime is 28624877. The reversal of 28624864 is 46842682.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28624861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 447232 + ... + 447295.

It is an arithmetic number, because the mean of its divisors is an integer number (4696272).

Almost surely, 2^28624864 is an apocalyptic number.

It is an amenable number.

28624864 is a deficient number, since it is larger than the sum of its proper divisors (27730400).

28624864 is an equidigital number, since it uses as much as digits as its factorization.

28624864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 894537 (or 894529 counting only the distinct ones).

The product of its digits is 147456, while the sum is 40.

The square root of 28624864 is about 5350.2209300178. The cubic root of 28624864 is about 305.9011741755.

The spelling of 28624864 in words is "twenty-eight million, six hundred twenty-four thousand, eight hundred sixty-four".