811952680 has 64 divisors (see below), whose sum is σ = 2277694080. Its totient is φ = 253075200.

The previous prime is 811952653. The next prime is 811952681. The reversal of 811952680 is 86259118.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (811952681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128731 + ... + 134890.

It is an arithmetic number, because the mean of its divisors is an integer number (35588970).

Almost surely, 2^811952680 is an apocalyptic number.

It is an amenable number.

811952680 is an abundant number, since it is smaller than the sum of its proper divisors (1465741400).

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

811952680 is a wasteful number, since it uses less digits than its factorization.

811952680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263650 (or 263646 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 40.

The square root of 811952680 is about 28494.7833822263. The cubic root of 811952680 is about 932.9182161900.

The spelling of 811952680 in words is "eight hundred eleven million, nine hundred fifty-two thousand, six hundred eighty".