8500864 has 16 divisors (see below), whose sum is σ = 16935570. Its totient is φ = 4250368.

The previous prime is 8500859. The next prime is 8500871. The reversal of 8500864 is 4680058.

It can be written as a sum of positive squares in only one way, i.e., 7795264 + 705600 = 2792^2 + 840^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33079 + ... + 33334.

Almost surely, 2^8500864 is an apocalyptic number.

It is an amenable number.

8500864 is a deficient number, since it is larger than the sum of its proper divisors (8434706).

8500864 is an equidigital number, since it uses as much as digits as its factorization.

8500864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66427 (or 66415 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 8500864 is about 2915.6241184350. The cubic root of 8500864 is about 204.0896696655.

The spelling of 8500864 in words is "eight million, five hundred thousand, eight hundred sixty-four".