811320960 has 64 divisors (see below), whose sum is σ = 2586091680. Its totient is φ = 216351744.

The previous prime is 811320949. The next prime is 811320989. The reversal of 811320960 is 69023118.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 209362 + ... + 213201.

Almost surely, 2^811320960 is an apocalyptic number.

811320960 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

811320960 is an abundant number, since it is smaller than the sum of its proper divisors (1774770720).

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

811320960 is a wasteful number, since it uses less digits than its factorization.

811320960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422585 (or 422573 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 811320960 is about 28483.6963893382. The cubic root of 811320960 is about 932.6762086538.

The spelling of 811320960 in words is "eight hundred eleven million, three hundred twenty thousand, nine hundred sixty".