56693440 has 28 divisors (see below), whose sum is σ = 135002016. Its totient is φ = 22677248.

The previous prime is 56693431. The next prime is 56693443. The reversal of 56693440 is 4439665.

It is a happy number.

It is a super-2 number, since 2×56693440² = 6428292278067200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 56693440.

It is not an unprimeable number, because it can be changed into a prime (56693443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88264 + ... + 88903.

Almost surely, 2^56693440 is an apocalyptic number.

It is an amenable number.

56693440 is an abundant number, since it is smaller than the sum of its proper divisors (78308576).

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

56693440 is a wasteful number, since it uses less digits than its factorization.

56693440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177184 (or 177174 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 37.

The square root of 56693440 is about 7529.5046317802. The cubic root of 56693440 is about 384.1589330530.

The spelling of 56693440 in words is "fifty-six million, six hundred ninety-three thousand, four hundred forty".