155293920 has 72 divisors (see below), whose sum is σ = 529945416. Its totient is φ = 41411328.

The previous prime is 155293903. The next prime is 155293933. The reversal of 155293920 is 29392551.

It is a happy number.

155293920 is digitally balanced in base 3, 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 (72).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52482 + ... + 55361.

It is an arithmetic number, because the mean of its divisors is an integer number (7360353).

Almost surely, 2^155293920 is an apocalyptic number.

155293920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155293920 is an abundant number, since it is smaller than the sum of its proper divisors (374651496).

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

155293920 is a wasteful number, since it uses less digits than its factorization.

155293920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107864 (or 107853 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 36.

The square root of 155293920 is about 12461.6981186354. The cubic root of 155293920 is about 537.5078578264.

The spelling of 155293920 in words is "one hundred fifty-five million, two hundred ninety-three thousand, nine hundred twenty".