79285857 has 32 divisors (see below), whose sum is σ = 126016512. Its totient is φ = 43395264.

The previous prime is 79285847. The next prime is 79285891. The reversal of 79285857 is 75858297.

It is not a de Polignac number, because 79285857 - 2⁷ = 79285729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79285847) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51298 + ... + 52820.

It is an arithmetic number, because the mean of its divisors is an integer number (3938016).

Almost surely, 2^79285857 is an apocalyptic number.

It is an amenable number.

79285857 is a deficient number, since it is larger than the sum of its proper divisors (46730655).

79285857 is a wasteful number, since it uses less digits than its factorization.

79285857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1637.

The product of its digits is 1411200, while the sum is 51.

The square root of 79285857 is about 8904.2606093937. The cubic root of 79285857 is about 429.6009584487.

The spelling of 79285857 in words is "seventy-nine million, two hundred eighty-five thousand, eight hundred fifty-seven".