155844120 has 64 divisors (see below), whose sum is σ = 473195520. Its totient is φ = 41055104.

The previous prime is 155844119. The next prime is 155844127. The reversal of 155844120 is 21448551.

155844120 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155844127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2137 + ... + 17783.

It is an arithmetic number, because the mean of its divisors is an integer number (7393680).

Almost surely, 2^155844120 is an apocalyptic number.

155844120 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 155844120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236597760).

155844120 is an abundant number, since it is smaller than the sum of its proper divisors (317351400).

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

155844120 is a wasteful number, since it uses less digits than its factorization.

155844120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15744 (or 15740 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 30.

The square root of 155844120 is about 12483.7542430152. The cubic root of 155844120 is about 538.1418990648.

The spelling of 155844120 in words is "one hundred fifty-five million, eight hundred forty-four thousand, one hundred twenty".