868642808 has 32 divisors (see below), whose sum is σ = 1798191360. Its totient is φ = 390077280.

The previous prime is 868642783. The next prime is 868642813. The reversal of 868642808 is 808246868.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52160 + ... + 66767.

It is an arithmetic number, because the mean of its divisors is an integer number (56193480).

Almost surely, 2^868642808 is an apocalyptic number.

868642808 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

868642808 is an abundant number, since it is smaller than the sum of its proper divisors (929548552).

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

868642808 is a wasteful number, since it uses less digits than its factorization.

868642808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119027 (or 119023 counting only the distinct ones).

The product of its (nonzero) digits is 1179648, while the sum is 50.

The square root of 868642808 is about 29472.7468689296. The cubic root of 868642808 is about 954.1436025656.

The spelling of 868642808 in words is "eight hundred sixty-eight million, six hundred forty-two thousand, eight hundred eight".