158790 has 32 divisors (see below), whose sum is σ = 391680. Its totient is φ = 41184.

The previous prime is 158777. The next prime is 158791. The reversal of 158790 is 97851.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158791) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1971 + ... + 2049.

It is an arithmetic number, because the mean of its divisors is an integer number (12240).

2¹⁵⁸⁷⁹⁰ is an apocalyptic number.

158790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 158790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195840).

158790 is an abundant number, since it is smaller than the sum of its proper divisors (232890).

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

158790 is a wasteful number, since it uses less digits than its factorization.

158790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156.

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

The square root of 158790 is about 398.4846295656. The cubic root of 158790 is about 54.1511540062.

The spelling of 158790 in words is "one hundred fifty-eight thousand, seven hundred ninety".