28655904 has 48 divisors (see below), whose sum is σ = 77656320. Its totient is φ = 9242880.

The previous prime is 28655903. The next prime is 28655929. The reversal of 28655904 is 40955682.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (28655903) 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, 1839 + ... + 7790.

It is an arithmetic number, because the mean of its divisors is an integer number (1617840).

Almost surely, 2^28655904 is an apocalyptic number.

28655904 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28655904 is an abundant number, since it is smaller than the sum of its proper divisors (49000416).

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

28655904 is a wasteful number, since it uses less digits than its factorization.

28655904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9673 (or 9665 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 39.

The square root of 28655904 is about 5353.1209588426. The cubic root of 28655904 is about 306.0117044521.

The spelling of 28655904 in words is "twenty-eight million, six hundred fifty-five thousand, nine hundred four".