56731140 has 72 divisors (see below), whose sum is σ = 172867968. Its totient is φ = 15059520.

The previous prime is 56731139. The next prime is 56731141. The reversal of 56731140 is 4113765.

It is an interprime number because it is at equal distance from previous prime (56731139) and next prime (56731141).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56731141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48199 + ... + 49361.

It is an arithmetic number, because the mean of its divisors is an integer number (2400944).

Almost surely, 2^56731140 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 56731140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86433984).

56731140 is an abundant number, since it is smaller than the sum of its proper divisors (116136828).

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

56731140 is a wasteful number, since it uses less digits than its factorization.

56731140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1449 (or 1444 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 56731140 is about 7532.0077004740. The cubic root of 56731140 is about 384.2440668457.

The spelling of 56731140 in words is "fifty-six million, seven hundred thirty-one thousand, one hundred forty".