47981904 has 20 divisors (see below), whose sum is σ = 123953376. Its totient is φ = 15993952.

The previous prime is 47981881. The next prime is 47981917. The reversal of 47981904 is 40918974.

It is a super-2 number, since 2×47981904² = 4604526222930432, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 499764 + ... + 499859.

Almost surely, 2^47981904 is an apocalyptic number.

It is an amenable number.

47981904 is an abundant number, since it is smaller than the sum of its proper divisors (75971472).

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

47981904 is a wasteful number, since it uses less digits than its factorization.

47981904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999634 (or 999628 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 47981904 is about 6926.8971408561. The cubic root of 47981904 is about 363.3784425284.

The spelling of 47981904 in words is "forty-seven million, nine hundred eighty-one thousand, nine hundred four".