28275904 has 14 divisors (see below), whose sum is σ = 56110124. Its totient is φ = 14137920.

The previous prime is 28275889. The next prime is 28275931. The reversal of 28275904 is 40957282.

It is an unprimeable number.

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, 220842 + ... + 220969.

It is an arithmetic number, because the mean of its divisors is an integer number (4007866).

Almost surely, 2^28275904 is an apocalyptic number.

It is an amenable number.

28275904 is a deficient number, since it is larger than the sum of its proper divisors (27834220).

28275904 is an equidigital number, since it uses as much as digits as its factorization.

28275904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441823 (or 441813 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 28275904 is about 5317.5091913414. The cubic root of 28275904 is about 304.6530283456.

The spelling of 28275904 in words is "twenty-eight million, two hundred seventy-five thousand, nine hundred four".