864808 has 16 divisors (see below), whose sum is σ = 1853280. Its totient is φ = 370608.

The previous prime is 864803. The next prime is 864811. The reversal of 864808 is 808468.

864808 = T₁₄₇ + T₁₄₈ + ... + T₂₀₂.

It is not an unprimeable number, because it can be changed into a prime (864803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7666 + ... + 7777.

It is an arithmetic number, because the mean of its divisors is an integer number (115830).

2⁸⁶⁴⁸⁰⁸ is an apocalyptic number.

It is an amenable number.

864808 is an abundant number, since it is smaller than the sum of its proper divisors (988472).

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

864808 is a wasteful number, since it uses less digits than its factorization.

864808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15456 (or 15452 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 34.

The square root of 864808 is about 929.9505363190. The cubic root of 864808 is about 95.2737441465.

The spelling of 864808 in words is "eight hundred sixty-four thousand, eight hundred eight".