155976320 has 128 divisors (see below), whose sum is σ = 399513600. Its totient is φ = 58060800.

The previous prime is 155976319. The next prime is 155976347. The reversal of 155976320 is 23679551.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×155976320² = 48657224801484800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1228097 + ... + 1228223.

It is an arithmetic number, because the mean of its divisors is an integer number (3121200).

Almost surely, 2^155976320 is an apocalyptic number.

155976320 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 155976320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (199756800).

155976320 is an abundant number, since it is smaller than the sum of its proper divisors (243537280).

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

155976320 is a wasteful number, since it uses less digits than its factorization.

155976320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266 (or 254 counting only the distinct ones).

The product of its (nonzero) digits is 56700, while the sum is 38.

The square root of 155976320 is about 12489.0480021497. The cubic root of 155976320 is about 538.2940216948.

The spelling of 155976320 in words is "one hundred fifty-five million, nine hundred seventy-six thousand, three hundred twenty".