155087920 has 60 divisors (see below), whose sum is σ = 390483936. Its totient is φ = 57258240.

The previous prime is 155087917. The next prime is 155087939. The reversal of 155087920 is 29780551.

It is a self number, because there is not a number n which added to its sum of digits gives 155087920.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7785 + ... + 19255.

Almost surely, 2^155087920 is an apocalyptic number.

155087920 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 155087920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195241968).

155087920 is an abundant number, since it is smaller than the sum of its proper divisors (235396016).

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

155087920 is a wasteful number, since it uses less digits than its factorization.

155087920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11510 (or 11491 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 37.

The square root of 155087920 is about 12453.4300495887. The cubic root of 155087920 is about 537.2700815823.

The spelling of 155087920 in words is "one hundred fifty-five million, eighty-seven thousand, nine hundred twenty".