155988870 has 16 divisors (see below), whose sum is σ = 374373360. Its totient is φ = 41597024.

The previous prime is 155988857. The next prime is 155988913. The reversal of 155988870 is 78889551.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

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, 2599785 + ... + 2599844.

It is an arithmetic number, because the mean of its divisors is an integer number (23398335).

Almost surely, 2^155988870 is an apocalyptic number.

155988870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155988870 is an abundant number, since it is smaller than the sum of its proper divisors (218384490).

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

155988870 is a wasteful number, since it uses less digits than its factorization.

155988870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5199639.

The product of its (nonzero) digits is 806400, while the sum is 51.

The square root of 155988870 is about 12489.5504322614. The cubic root of 155988870 is about 538.3084585204.

The spelling of 155988870 in words is "one hundred fifty-five million, nine hundred eighty-eight thousand, eight hundred seventy".