56669872 has 90 divisors (see below), whose sum is σ = 133959804. Its totient is φ = 23143680.

The previous prime is 56669867. The next prime is 56669887. The reversal of 56669872 is 27896665.

It is a happy number.

It is a super-2 number, since 2×56669872² = 6422948784992768, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1317883 + ... + 1317925.

Almost surely, 2^56669872 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 56669872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66979902).

56669872 is an abundant number, since it is smaller than the sum of its proper divisors (77289932).

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

56669872 is a wasteful number, since it uses less digits than its factorization.

56669872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147 (or 93 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 49.

The square root of 56669872 is about 7527.9394258987. The cubic root of 56669872 is about 384.1056928391.

The spelling of 56669872 in words is "fifty-six million, six hundred sixty-nine thousand, eight hundred seventy-two".