155958120 has 96 divisors (see below), whose sum is σ = 510887520. Its totient is φ = 41258880.

The previous prime is 155958113. The next prime is 155958133. The reversal of 155958120 is 21859551.

It is a happy number.

155958120 is a `hidden beast` number, since 1 + 5 + 59 + 581 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45507 + ... + 48813.

It is an arithmetic number, because the mean of its divisors is an integer number (5321745).

Almost surely, 2^155958120 is an apocalyptic number.

155958120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155958120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (255443760).

155958120 is an abundant number, since it is smaller than the sum of its proper divisors (354929400).

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

155958120 is a wasteful number, since it uses less digits than its factorization.

155958120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3455 (or 3448 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 36.

The square root of 155958120 is about 12488.3193424896. The cubic root of 155958120 is about 538.2730840459.

The spelling of 155958120 in words is "one hundred fifty-five million, nine hundred fifty-eight thousand, one hundred twenty".