811524868 has 72 divisors (see below), whose sum is σ = 1818712224. Its totient is φ = 313286400.

The previous prime is 811524863. The next prime is 811524871. The reversal of 811524868 is 868425118.

It is a super-2 number, since 2×811524868² = 1317145222764834848, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (811524863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 241963 + ... + 245293.

It is an arithmetic number, because the mean of its divisors is an integer number (25259892).

Almost surely, 2^811524868 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 811524868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (909356112).

811524868 is an abundant number, since it is smaller than the sum of its proper divisors (1007187356).

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

811524868 is a wasteful number, since it uses less digits than its factorization.

811524868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3473 (or 3464 counting only the distinct ones).

The product of its digits is 122880, while the sum is 43.

The square root of 811524868 is about 28487.2755454080. The cubic root of 811524868 is about 932.7543381156.

The spelling of 811524868 in words is "eight hundred eleven million, five hundred twenty-four thousand, eight hundred sixty-eight".