155982 has 8 divisors (see below), whose sum is σ = 311976. Its totient is φ = 51992.

The previous prime is 155921. The next prime is 156007. The reversal of 155982 is 289551.

It is a sphenic number, since it is the product of 3 distinct primes.

155982 is an admirable number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 155982.

It is an unprimeable number.

155982 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12993 + ... + 13004.

It is an arithmetic number, because the mean of its divisors is an integer number (38997).

2¹⁵⁵⁹⁸² is an apocalyptic number.

155982 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

155982 is a wasteful number, since it uses less digits than its factorization.

155982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26002.

The product of its digits is 3600, while the sum is 30.

The square root of 155982 is about 394.9455658695. The cubic root of 155982 is about 53.8300555748.

The spelling of 155982 in words is "one hundred fifty-five thousand, nine hundred eighty-two".