811399572 has 48 divisors (see below), whose sum is σ = 2105436480. Its totient is φ = 270234144.

The previous prime is 811399517. The next prime is 811399577. The reversal of 811399572 is 275993118.

811399572 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811399577) 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, 162018 + ... + 166950.

It is an arithmetic number, because the mean of its divisors is an integer number (43863260).

Almost surely, 2^811399572 is an apocalyptic number.

It is an amenable number.

811399572 is an abundant number, since it is smaller than the sum of its proper divisors (1294036908).

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

811399572 is a wasteful number, since it uses less digits than its factorization.

811399572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6469 (or 6461 counting only the distinct ones).

The product of its digits is 136080, while the sum is 45.

The square root of 811399572 is about 28485.0763032153. The cubic root of 811399572 is about 932.7063312061.

The spelling of 811399572 in words is "eight hundred eleven million, three hundred ninety-nine thousand, five hundred seventy-two".