56668390 has 16 divisors (see below), whose sum is σ = 103676400. Its totient is φ = 22295520.

The previous prime is 56668387. The next prime is 56668397. The reversal of 56668390 is 9386665.

It is a super-2 number, since 2×56668390² = 6422612850384200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56668397) 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, 45840 + ... + 47059.

It is an arithmetic number, because the mean of its divisors is an integer number (6479775).

Almost surely, 2^56668390 is an apocalyptic number.

56668390 is a deficient number, since it is larger than the sum of its proper divisors (47008010).

56668390 is a wasteful number, since it uses less digits than its factorization.

56668390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92967.

The product of its (nonzero) digits is 233280, while the sum is 43.

The square root of 56668390 is about 7527.8409919445. The cubic root of 56668390 is about 384.1023445015.

The spelling of 56668390 in words is "fifty-six million, six hundred sixty-eight thousand, three hundred ninety".