56239857 has 12 divisors (see below), whose sum is σ = 82349124. Its totient is φ = 36979200.

The previous prime is 56239847. The next prime is 56239873. The reversal of 56239857 is 75893265.

It is a happy number.

56239857 is a `hidden beast` number, since 562 + 3 + 9 + 85 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 27499536 + 28740321 = 5244^2 + 5361^2 .

It is not a de Polignac number, because 56239857 - 2⁶ = 56239793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56239847) 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, 42144 + ... + 43457.

It is an arithmetic number, because the mean of its divisors is an integer number (6862427).

Almost surely, 2^56239857 is an apocalyptic number.

It is an amenable number.

56239857 is a deficient number, since it is larger than the sum of its proper divisors (26109267).

56239857 is a wasteful number, since it uses less digits than its factorization.

56239857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85680 (or 85677 counting only the distinct ones).

The product of its digits is 453600, while the sum is 45.

The square root of 56239857 is about 7499.3237695142. The cubic root of 56239857 is about 383.1316846596.

The spelling of 56239857 in words is "fifty-six million, two hundred thirty-nine thousand, eight hundred fifty-seven".