155830988 has 12 divisors (see below), whose sum is σ = 273229320. Its totient is φ = 77765472.

The previous prime is 155830973. The next prime is 155831023. The reversal of 155830988 is 889038551.

It is a super-2 number, since 2×155830988² = 48566593642112288, which contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 35153 + ... + 39336.

It is an arithmetic number, because the mean of its divisors is an integer number (22769110).

Almost surely, 2^155830988 is an apocalyptic number.

It is an amenable number.

155830988 is a deficient number, since it is larger than the sum of its proper divisors (117398332).

155830988 is a wasteful number, since it uses less digits than its factorization.

155830988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75016 (or 75014 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 47.

The square root of 155830988 is about 12483.2282683607. The cubic root of 155830988 is about 538.1267833668.

The spelling of 155830988 in words is "one hundred fifty-five million, eight hundred thirty thousand, nine hundred eighty-eight".