155720872 has 16 divisors (see below), whose sum is σ = 293066100. Its totient is φ = 77570992.

The previous prime is 155720857. The next prime is 155720881. The reversal of 155720872 is 278027551.

The cubic root of 155720872 is 538.

It is a perfect power (a cube), and thus also a powerful number.

155720872 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 22410756 + 133310116 = 4734^2 + 11546^2 .

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, 578754 + ... + 579022.

Almost surely, 2^155720872 is an apocalyptic number.

It is an amenable number.

155720872 is a deficient number, since it is larger than the sum of its proper divisors (137345228).

155720872 is an frugal number, since it uses more digits than its factorization.

155720872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813 (or 271 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 37.

The square root of 155720872 is about 12478.8169311037.

The spelling of 155720872 in words is "one hundred fifty-five million, seven hundred twenty thousand, eight hundred seventy-two".