811392768 has 72 divisors (see below), whose sum is σ = 2399451600. Its totient is φ = 270461952.

The previous prime is 811392767. The next prime is 811392787. The reversal of 811392768 is 867293118.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811392763) 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 7 ways as a sum of consecutive naturals, for example, 51783 + ... + 65606.

Almost surely, 2^811392768 is an apocalyptic number.

It is an amenable number.

811392768 is an abundant number, since it is smaller than the sum of its proper divisors (1588058832).

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

811392768 is a wasteful number, since it uses less digits than its factorization.

811392768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117414 (or 117394 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 811392768 is about 28484.9568720053. The cubic root of 811392768 is about 932.7037241257.

The spelling of 811392768 in words is "eight hundred eleven million, three hundred ninety-two thousand, seven hundred sixty-eight".