56172890 has 16 divisors (see below), whose sum is σ = 101404008. Its totient is φ = 22404096.

The previous prime is 56172889. The next prime is 56172917. The reversal of 56172890 is 9827165.

It can be written as a sum of positive squares in 4 ways, for example, as 49857721 + 6315169 = 7061^2 + 2513^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4427 + ... + 11486.

Almost surely, 2^56172890 is an apocalyptic number.

56172890 is a deficient number, since it is larger than the sum of its proper divisors (45231118).

56172890 is a wasteful number, since it uses less digits than its factorization.

56172890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16273.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 56172890 is about 7494.8575703612. The cubic root of 56172890 is about 382.9795542944.

The spelling of 56172890 in words is "fifty-six million, one hundred seventy-two thousand, eight hundred ninety".