8722857 has 16 divisors (see below), whose sum is σ = 13664448. Its totient is φ = 4879680.

The previous prime is 8722841. The next prime is 8722859. The reversal of 8722857 is 7582278.

It is not a de Polignac number, because 8722857 - 2⁴ = 8722841 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (8722859) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9738 + ... + 10595.

It is an arithmetic number, because the mean of its divisors is an integer number (854028).

Almost surely, 2^8722857 is an apocalyptic number.

It is an amenable number.

8722857 is a deficient number, since it is larger than the sum of its proper divisors (4941591).

8722857 is a wasteful number, since it uses less digits than its factorization.

8722857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20360.

The product of its digits is 62720, while the sum is 39.

The square root of 8722857 is about 2953.4483235703. The cubic root of 8722857 is about 205.8509699119.

The spelling of 8722857 in words is "eight million, seven hundred twenty-two thousand, eight hundred fifty-seven".