157980 has 24 divisors (see below), whose sum is σ = 442512. Its totient is φ = 42112.

The previous prime is 157951. The next prime is 157991. The reversal of 157980 is 89751.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a nialpdrome in base 12.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1257 + ... + 1376.

It is an arithmetic number, because the mean of its divisors is an integer number (18438).

2¹⁵⁷⁹⁸⁰ is an apocalyptic number.

157980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

157980 is an abundant number, since it is smaller than the sum of its proper divisors (284532).

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

157980 is a wasteful number, since it uses less digits than its factorization.

157980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2645 (or 2643 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 30.

The square root of 157980 is about 397.4669797606. The cubic root of 157980 is about 54.0589205979.

The spelling of 157980 in words is "one hundred fifty-seven thousand, nine hundred eighty".