56001690 has 24 divisors (see below), whose sum is σ = 145604628. Its totient is φ = 14933760.

The previous prime is 56001653. The next prime is 56001691. The reversal of 56001690 is 9610065.

56001690 is a `hidden beast` number, since 560 + 0 + 16 + 90 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 55487601 + 514089 = 7449^2 + 717^2 .

It is a super-2 number, since 2×56001690² = 6272378565712200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (56001691) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 311031 + ... + 311210.

Almost surely, 2^56001690 is an apocalyptic number.

56001690 is an abundant number, since it is smaller than the sum of its proper divisors (89602938).

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

56001690 is a wasteful number, since it uses less digits than its factorization.

56001690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622254 (or 622251 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 56001690 is about 7483.4276905707. The cubic root of 56001690 is about 382.5900851511.

The spelling of 56001690 in words is "fifty-six million, one thousand, six hundred ninety".