8520864 has 48 divisors (see below), whose sum is σ = 24403680. Its totient is φ = 2581760.

The previous prime is 8520851. The next prime is 8520887. The reversal of 8520864 is 4680258.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2979 + ... + 5090.

It is an arithmetic number, because the mean of its divisors is an integer number (508410).

Almost surely, 2^8520864 is an apocalyptic number.

It is an amenable number.

8520864 is an abundant number, since it is smaller than the sum of its proper divisors (15882816).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8520864 is a wasteful number, since it uses less digits than its factorization.

8520864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8093 (or 8085 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 8520864 is about 2919.0519008747. The cubic root of 8520864 is about 204.2495983696.

Subtracting from 8520864 its reverse (4680258), we obtain a triangular number (3840606 = T₂₇₇₁).

The spelling of 8520864 in words is "eight million, five hundred twenty thousand, eight hundred sixty-four".