56664228 has 24 divisors (see below), whose sum is σ = 132701632. Its totient is φ = 18818784.

The previous prime is 56664217. The next prime is 56664229. The reversal of 56664228 is 82246665.

It is not an unprimeable number, because it can be changed into a prime (56664229) 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, 5200 + ... + 11847.

Almost surely, 2^56664228 is an apocalyptic number.

It is an amenable number.

56664228 is an abundant number, since it is smaller than the sum of its proper divisors (76037404).

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

56664228 is a wasteful number, since it uses less digits than its factorization.

56664228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17331 (or 17329 counting only the distinct ones).

The product of its digits is 138240, while the sum is 39.

The square root of 56664228 is about 7527.5645463855. The cubic root of 56664228 is about 384.0929408281.

The spelling of 56664228 in words is "fifty-six million, six hundred sixty-four thousand, two hundred twenty-eight".