155825920 has 144 divisors (see below), whose sum is σ = 400296960. Its totient is φ = 57987072.

The previous prime is 155825909. The next prime is 155825947. The reversal of 155825920 is 29528551.

It is a self number, because there is not a number n which added to its sum of digits gives 155825920.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1972441 + ... + 1972519.

It is an arithmetic number, because the mean of its divisors is an integer number (2779840).

Almost surely, 2^155825920 is an apocalyptic number.

155825920 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 155825920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (200148480).

155825920 is an abundant number, since it is smaller than the sum of its proper divisors (244471040).

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

155825920 is an equidigital number, since it uses as much as digits as its factorization.

155825920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190 (or 176 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 37.

The square root of 155825920 is about 12483.0252743476. The cubic root of 155825920 is about 538.1209495761.

The spelling of 155825920 in words is "one hundred fifty-five million, eight hundred twenty-five thousand, nine hundred twenty".