56916440 has 96 divisors (see below), whose sum is σ = 151437600. Its totient is φ = 19192320.

The previous prime is 56916413. The next prime is 56916449. The reversal of 56916440 is 4461965.

It is a super-2 number, since 2×56916440² = 6478962284547200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 56916440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56916449) 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, 138956 + ... + 139364.

It is an arithmetic number, because the mean of its divisors is an integer number (1577475).

Almost surely, 2^56916440 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 56916440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75718800).

56916440 is an abundant number, since it is smaller than the sum of its proper divisors (94521160).

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

56916440 is a wasteful number, since it uses less digits than its factorization.

56916440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505 (or 494 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 56916440 is about 7544.2985094706. The cubic root of 56916440 is about 384.6619622361.

The spelling of 56916440 in words is "fifty-six million, nine hundred sixteen thousand, four hundred forty".