28477904 has 40 divisors (see below), whose sum is σ = 67912320. Its totient is φ = 11265408.

The previous prime is 28477879. The next prime is 28477919. The reversal of 28477904 is 40977482.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8324 + ... + 11235.

It is an arithmetic number, because the mean of its divisors is an integer number (1697808).

Almost surely, 2^28477904 is an apocalyptic number.

It is an amenable number.

28477904 is an abundant number, since it is smaller than the sum of its proper divisors (39434416).

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

28477904 is a wasteful number, since it uses less digits than its factorization.

28477904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19587 (or 19581 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 28477904 is about 5336.4692447348. The cubic root of 28477904 is about 305.3767770393.

The spelling of 28477904 in words is "twenty-eight million, four hundred seventy-seven thousand, nine hundred four".