155023920 has 120 divisors (see below), whose sum is σ = 524706000. Its totient is φ = 41015808.

The previous prime is 155023903. The next prime is 155023943. The reversal of 155023920 is 29320551.

155023920 is a `hidden beast` number, since 1 + 550 + 23 + 92 + 0 = 666.

155023920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (120).

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, 99306 + ... + 100854.

It is an arithmetic number, because the mean of its divisors is an integer number (4372550).

Almost surely, 2^155023920 is an apocalyptic number.

155023920 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 155023920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (262353000).

155023920 is an abundant number, since it is smaller than the sum of its proper divisors (369682080).

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

155023920 is a wasteful number, since it uses less digits than its factorization.

155023920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1707 (or 1698 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 155023920 is about 12450.8602112465. The cubic root of 155023920 is about 537.1961664847.

The spelling of 155023920 in words is "one hundred fifty-five million, twenty-three thousand, nine hundred twenty".