158920 has 32 divisors (see below), whose sum is σ = 372600. Its totient is φ = 60928.

The previous prime is 158909. The next prime is 158923. The reversal of 158920 is 29851.

It can be written as a sum of positive squares in 4 ways, for example, as 133956 + 24964 = 366^2 + 158^2 .

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (158923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1092 + ... + 1228.

2¹⁵⁸⁹²⁰ is an apocalyptic number.

158920 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 158920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (186300).

158920 is an abundant number, since it is smaller than the sum of its proper divisors (213680).

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

158920 is a wasteful number, since it uses less digits than its factorization.

158920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177 (or 173 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 158920 is about 398.6477141537. The cubic root of 158920 is about 54.1659276691.

The spelling of 158920 in words is "one hundred fifty-eight thousand, nine hundred twenty".