56715840 has 168 divisors, whose sum is σ = 199704960. Its totient is φ = 14767104.

The previous prime is 56715823. The next prime is 56715847. The reversal of 56715840 is 4851765.

56715840 is a `hidden beast` number, since 5 + 6 + 71 + 584 + 0 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 56715795 and 56715804.

It is not an unprimeable number, because it can be changed into a prime (56715847) 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, 135151 + ... + 135569.

It is an arithmetic number, because the mean of its divisors is an integer number (1188720).

Almost surely, 2^56715840 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 56715840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99852480).

56715840 is an abundant number, since it is smaller than the sum of its proper divisors (142989120).

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

56715840 is a wasteful number, since it uses less digits than its factorization.

56715840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489 (or 476 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 56715840 is about 7530.9919665340. The cubic root of 56715840 is about 384.2095210754.

It can be divided in two parts, 5671 and 5840, that added together give a palindrome (11511).

The spelling of 56715840 in words is "fifty-six million, seven hundred fifteen thousand, eight hundred forty".