872545772 has 24 divisors (see below), whose sum is σ = 1760541216. Its totient is φ = 370637568.

The previous prime is 872545771. The next prime is 872545777. The reversal of 872545772 is 277545278.

It is a super-2 number, since 2×872545772² = 1522672248470151968, which contains 22 as substring.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (872545771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134723 + ... + 141050.

It is an arithmetic number, because the mean of its divisors is an integer number (73355884).

Almost surely, 2^872545772 is an apocalyptic number.

It is an amenable number.

872545772 is an abundant number, since it is smaller than the sum of its proper divisors (887995444).

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

872545772 is a wasteful number, since it uses less digits than its factorization.

872545772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275897 (or 275895 counting only the distinct ones).

The product of its digits is 1097600, while the sum is 47.

The square root of 872545772 is about 29538.8857609762. The cubic root of 872545772 is about 955.5705122491.

The spelling of 872545772 in words is "eight hundred seventy-two million, five hundred forty-five thousand, seven hundred seventy-two".