56669172 has 48 divisors (see below), whose sum is σ = 159075840. Its totient is φ = 15338592.

The previous prime is 56669167. The next prime is 56669189. The reversal of 56669172 is 27196665.

It is a super-2 number, since 2×56669172² = 6422790110331168, which contains 22 as substring.

It is a hoax number, since the sum of its digits (42) 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 (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16158 + ... + 19349.

It is an arithmetic number, because the mean of its divisors is an integer number (3314080).

Almost surely, 2^56669172 is an apocalyptic number.

It is an amenable number.

56669172 is an abundant number, since it is smaller than the sum of its proper divisors (102406668).

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

56669172 is a wasteful number, since it uses less digits than its factorization.

56669172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35540 (or 35538 counting only the distinct ones).

The product of its digits is 136080, while the sum is 42.

The square root of 56669172 is about 7527.8929322886. The cubic root of 56669172 is about 384.1041113104.

The spelling of 56669172 in words is "fifty-six million, six hundred sixty-nine thousand, one hundred seventy-two".