158820 has 24 divisors (see below), whose sum is σ = 444864. Its totient is φ = 42336.

The previous prime is 158803. The next prime is 158843. The reversal of 158820 is 28851.

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, 1264 + ... + 1383.

It is an arithmetic number, because the mean of its divisors is an integer number (18536).

2¹⁵⁸⁸²⁰ is an apocalyptic number.

158820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

158820 is an abundant number, since it is smaller than the sum of its proper divisors (286044).

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

158820 is a wasteful number, since it uses less digits than its factorization.

158820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2659 (or 2657 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 24.

The square root of 158820 is about 398.5222703940. The cubic root of 158820 is about 54.1545640285.

The spelling of 158820 in words is "one hundred fifty-eight thousand, eight hundred twenty".