158620 has 48 divisors (see below), whose sum is σ = 419328. Its totient is φ = 48960.

The previous prime is 158617. The next prime is 158621. The reversal of 158620 is 26851.

It is a happy number.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 158591 and 158600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158621) 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, 1489 + ... + 1591.

It is an arithmetic number, because the mean of its divisors is an integer number (8736).

2¹⁵⁸⁶²⁰ is an apocalyptic number.

158620 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 158620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (209664).

158620 is an abundant number, since it is smaller than the sum of its proper divisors (260708).

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

158620 is a wasteful number, since it uses less digits than its factorization.

158620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130 (or 128 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 158620 is about 398.2712643413. The cubic root of 158620 is about 54.1318224292.

Subtracting from 158620 its reverse (26851), we obtain a square (131769 = 363²).

The spelling of 158620 in words is "one hundred fifty-eight thousand, six hundred twenty".