155120388 has 12 divisors (see below), whose sum is σ = 361947600. Its totient is φ = 51706792.

The previous prime is 155120387. The next prime is 155120419. The reversal of 155120388 is 883021551.

It is a happy number.

155120388 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 (12).

It is not an unprimeable number, because it can be changed into a prime (155120387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6463338 + ... + 6463361.

It is an arithmetic number, because the mean of its divisors is an integer number (30162300).

Almost surely, 2^155120388 is an apocalyptic number.

It is an amenable number.

155120388 is an abundant number, since it is smaller than the sum of its proper divisors (206827212).

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

155120388 is a wasteful number, since it uses less digits than its factorization.

155120388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12926706 (or 12926704 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 33.

The square root of 155120388 is about 12454.7335579690. The cubic root of 155120388 is about 537.3075718606.

The spelling of 155120388 in words is "one hundred fifty-five million, one hundred twenty thousand, three hundred eighty-eight".