800631864 has 80 divisors (see below), whose sum is σ = 2374455600. Its totient is φ = 251175168.

The previous prime is 800631859. The next prime is 800631883. The reversal of 800631864 is 468136008.

It is a happy number.

It is a super-2 number, since 2×800631864² = 1282022763304228992, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 25324 + ... + 47355.

It is an arithmetic number, because the mean of its divisors is an integer number (29680695).

Almost surely, 2^800631864 is an apocalyptic number.

It is an amenable number.

800631864 is an abundant number, since it is smaller than the sum of its proper divisors (1573823736).

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

800631864 is a wasteful number, since it uses less digits than its factorization.

800631864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72714 (or 72701 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 800631864 is about 28295.4389257350. The cubic root of 800631864 is about 928.5621068120.

The spelling of 800631864 in words is "eight hundred million, six hundred thirty-one thousand, eight hundred sixty-four".