872620642 has 16 divisors (see below), whose sum is σ = 1387131480. Its totient is φ = 410288128.

The previous prime is 872620613. The next prime is 872620669. The reversal of 872620642 is 246026278.

It can be written as a sum of positive squares in 4 ways, for example, as 872552521 + 68121 = 29539^2 + 261^2 .

It is a super-2 number, since 2×872620642² = 1522933569688984328, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30834 + ... + 51922.

Almost surely, 2^872620642 is an apocalyptic number.

872620642 is a deficient number, since it is larger than the sum of its proper divisors (514510838).

872620642 is a wasteful number, since it uses less digits than its factorization.

872620642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22325.

The product of its (nonzero) digits is 64512, while the sum is 37.

The square root of 872620642 is about 29540.1530463199. The cubic root of 872620642 is about 955.5978428184.

The spelling of 872620642 in words is "eight hundred seventy-two million, six hundred twenty thousand, six hundred forty-two".