56139992 has 8 divisors (see below), whose sum is σ = 105262500. Its totient is φ = 28069992.

The previous prime is 56139991. The next prime is 56140009. The reversal of 56139992 is 29993165.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56139991) by changing a digit.

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 as a sum of consecutive naturals, namely, 3508742 + ... + 3508757.

Almost surely, 2^56139992 is an apocalyptic number.

It is an amenable number.

56139992 is a deficient number, since it is larger than the sum of its proper divisors (49122508).

56139992 is a wasteful number, since it uses less digits than its factorization.

56139992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7017505 (or 7017501 counting only the distinct ones).

The product of its digits is 131220, while the sum is 44.

The square root of 56139992 is about 7492.6625441161. The cubic root of 56139992 is about 382.9047749137.

The spelling of 56139992 in words is "fifty-six million, one hundred thirty-nine thousand, nine hundred ninety-two".