28475904 has 40 divisors (see below), whose sum is σ = 75865680. Its totient is φ = 9491456.

The previous prime is 28475879. The next prime is 28475917. The reversal of 28475904 is 40957482.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7734 + ... + 10805.

It is an arithmetic number, because the mean of its divisors is an integer number (1896642).

Almost surely, 2^28475904 is an apocalyptic number.

28475904 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28475904 is an abundant number, since it is smaller than the sum of its proper divisors (47389776).

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

28475904 is an equidigital number, since it uses as much as digits as its factorization.

28475904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18560 (or 18544 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 28475904 is about 5336.2818516267. The cubic root of 28475904 is about 305.3696280131.

The spelling of 28475904 in words is "twenty-eight million, four hundred seventy-five thousand, nine hundred four".