155949872 has 40 divisors (see below), whose sum is σ = 342530160. Its totient is φ = 68186880.

The previous prime is 155949851. The next prime is 155949877. The reversal of 155949872 is 278949551.

It is a self number, because there is not a number n which added to its sum of digits gives 155949872.

It is not an unprimeable number, because it can be changed into a prime (155949877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15779 + ... + 23682.

It is an arithmetic number, because the mean of its divisors is an integer number (8563254).

Almost surely, 2^155949872 is an apocalyptic number.

It is an amenable number.

155949872 is an abundant number, since it is smaller than the sum of its proper divisors (186580288).

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

155949872 is a wasteful number, since it uses less digits than its factorization.

155949872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39501 (or 39495 counting only the distinct ones).

The product of its digits is 907200, while the sum is 50.

The square root of 155949872 is about 12487.9891095404. The cubic root of 155949872 is about 538.2635948432.

The spelling of 155949872 in words is "one hundred fifty-five million, nine hundred forty-nine thousand, eight hundred seventy-two".