818960857 has 32 divisors (see below), whose sum is σ = 1016709120. Its totient is φ = 648544320.

The previous prime is 818960851. The next prime is 818960893. The reversal of 818960857 is 758069818.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-818960857 is a prime.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (818960851) 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, 1040218 + ... + 1041004.

It is an arithmetic number, because the mean of its divisors is an integer number (31772160).

Almost surely, 2^818960857 is an apocalyptic number.

It is an amenable number.

818960857 is a deficient number, since it is larger than the sum of its proper divisors (197748263).

818960857 is a wasteful number, since it uses less digits than its factorization.

818960857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1213.

The product of its (nonzero) digits is 967680, while the sum is 52.

The square root of 818960857 is about 28617.4921507808. The cubic root of 818960857 is about 935.5946180995.

The spelling of 818960857 in words is "eight hundred eighteen million, nine hundred sixty thousand, eight hundred fifty-seven".