811424872 has 16 divisors (see below), whose sum is σ = 1573884900. Its totient is φ = 391722240.

The previous prime is 811424869. The next prime is 811424899. The reversal of 811424872 is 278424118.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 772061796 + 39363076 = 27786^2 + 6274^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1748529 + ... + 1748992.

Almost surely, 2^811424872 is an apocalyptic number.

It is an amenable number.

811424872 is a deficient number, since it is larger than the sum of its proper divisors (762460028).

811424872 is a wasteful number, since it uses less digits than its factorization.

811424872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3497556 (or 3497552 counting only the distinct ones).

The product of its digits is 28672, while the sum is 37.

The square root of 811424872 is about 28485.5203919465. The cubic root of 811424872 is about 932.7160252482.

The spelling of 811424872 in words is "eight hundred eleven million, four hundred twenty-four thousand, eight hundred seventy-two".