872428072 has 8 divisors (see below), whose sum is σ = 1635802650. Its totient is φ = 436214032.

The previous prime is 872428057. The next prime is 872428091. The reversal of 872428072 is 270824278.

It can be written as a sum of positive squares in only one way, i.e., 609793636 + 262634436 = 24694^2 + 16206^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×872428072² = 1522261481627274368, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54526747 + ... + 54526762.

Almost surely, 2^872428072 is an apocalyptic number.

It is an amenable number.

872428072 is a deficient number, since it is larger than the sum of its proper divisors (763374578).

872428072 is a wasteful number, since it uses less digits than its factorization.

872428072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109053515 (or 109053511 counting only the distinct ones).

The product of its (nonzero) digits is 100352, while the sum is 40.

The square root of 872428072 is about 29536.8934046897. The cubic root of 872428072 is about 955.5275438416.

The spelling of 872428072 in words is "eight hundred seventy-two million, four hundred twenty-eight thousand, seventy-two".