155889960 has 128 divisors (see below), whose sum is σ = 482734080. Its totient is φ = 40255488.

The previous prime is 155889919. The next prime is 155890001. The reversal of 155889960 is 69988551.

It is an interprime number because it is at equal distance from previous prime (155889919) and next prime (155890001).

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 31 ways as a sum of consecutive naturals, for example, 807624 + ... + 807816.

It is an arithmetic number, because the mean of its divisors is an integer number (3771360).

Almost surely, 2^155889960 is an apocalyptic number.

155889960 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 155889960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241367040).

155889960 is an abundant number, since it is smaller than the sum of its proper divisors (326844120).

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

155889960 is a wasteful number, since it uses less digits than its factorization.

155889960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387 (or 383 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 51.

The square root of 155889960 is about 12485.5900941846. The cubic root of 155889960 is about 538.1946569239.

The spelling of 155889960 in words is "one hundred fifty-five million, eight hundred eighty-nine thousand, nine hundred sixty".