47921904 has 30 divisors (see below), whose sum is σ = 134115176. Its totient is φ = 15973920.

The previous prime is 47921899. The next prime is 47921941. The reversal of 47921904 is 40912974.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 166252 + ... + 166539.

Almost surely, 2^47921904 is an apocalyptic number.

It is an amenable number.

47921904 is an abundant number, since it is smaller than the sum of its proper divisors (86193272).

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

47921904 is a wasteful number, since it uses less digits than its factorization.

47921904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332805 (or 332796 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 47921904 is about 6922.5648425999. The cubic root of 47921904 is about 363.2269145638.

The spelling of 47921904 in words is "forty-seven million, nine hundred twenty-one thousand, nine hundred four".