872816404 has 12 divisors (see below), whose sum is σ = 1528594228. Its totient is φ = 436075200.

The previous prime is 872816401. The next prime is 872816449. The reversal of 872816404 is 404618278.

It can be written as a sum of positive squares in 2 ways, for example, as 830592400 + 42224004 = 28820^2 + 6498^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (872816401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77307 + ... + 87874.

Almost surely, 2^872816404 is an apocalyptic number.

It is an amenable number.

872816404 is a deficient number, since it is larger than the sum of its proper divisors (655777824).

872816404 is a wasteful number, since it uses less digits than its factorization.

872816404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166506 (or 166504 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 40.

The square root of 872816404 is about 29543.4663504471. The cubic root of 872816404 is about 955.6692964561.

The spelling of 872816404 in words is "eight hundred seventy-two million, eight hundred sixteen thousand, four hundred four".