56139872 has 48 divisors (see below), whose sum is σ = 116847360. Its totient is φ = 26497152.

The previous prime is 56139871. The next prime is 56139887. The reversal of 56139872 is 27893165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56139871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60629 + ... + 61547.

It is an arithmetic number, because the mean of its divisors is an integer number (2434320).

Almost surely, 2^56139872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56139872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58423680).

56139872 is an abundant number, since it is smaller than the sum of its proper divisors (60707488).

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

56139872 is a wasteful number, since it uses less digits than its factorization.

56139872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1035 (or 1027 counting only the distinct ones).

The product of its digits is 90720, while the sum is 41.

The square root of 56139872 is about 7492.6545362775. The cubic root of 56139872 is about 382.9045020921.

The spelling of 56139872 in words is "fifty-six million, one hundred thirty-nine thousand, eight hundred seventy-two".