155987660 has 48 divisors (see below), whose sum is σ = 346063872. Its totient is φ = 58968000.

The previous prime is 155987647. The next prime is 155987669. The reversal of 155987660 is 66789551.

It is not an unprimeable number, because it can be changed into a prime (155987669) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 23735 + ... + 29585.

It is an arithmetic number, because the mean of its divisors is an integer number (7209664).

Almost surely, 2^155987660 is an apocalyptic number.

155987660 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 155987660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (173031936).

155987660 is an abundant number, since it is smaller than the sum of its proper divisors (190076212).

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

155987660 is a wasteful number, since it uses less digits than its factorization.

155987660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5934 (or 5932 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 47.

The square root of 155987660 is about 12489.5019916728. The cubic root of 155987660 is about 538.3070666371.

The spelling of 155987660 in words is "one hundred fifty-five million, nine hundred eighty-seven thousand, six hundred sixty".