8900640857 has 16 divisors (see below), whose sum is σ = 9529626624. Its totient is φ = 8297640000.

The previous prime is 8900640811. The next prime is 8900640863. The reversal of 8900640857 is 7580460098.

It is a cyclic number.

It is not a de Polignac number, because 8900640857 - 2²⁸ = 8632205401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8900640157) 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, 77432 + ... + 154262.

It is an arithmetic number, because the mean of its divisors is an integer number (595601664).

Almost surely, 2^8900640857 is an apocalyptic number.

It is an amenable number.

8900640857 is a deficient number, since it is larger than the sum of its proper divisors (628985767).

8900640857 is a wasteful number, since it uses less digits than its factorization.

8900640857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77000.

The product of its (nonzero) digits is 483840, while the sum is 47.

The square root of 8900640857 is about 94343.2077947321. The cubic root of 8900640857 is about 2072.4008377159.

The spelling of 8900640857 in words is "eight billion, nine hundred million, six hundred forty thousand, eight hundred fifty-seven".