158220 has 48 divisors (see below), whose sum is σ = 493920. Its totient is φ = 42048.

The previous prime is 158209. The next prime is 158227. The reversal of 158220 is 22851.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 158193 and 158202.

It is not an unprimeable number, because it can be changed into a prime (158227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 394 + ... + 686.

It is an arithmetic number, because the mean of its divisors is an integer number (10290).

2¹⁵⁸²²⁰ is an apocalyptic number.

158220 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 158220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (246960).

158220 is an abundant number, since it is smaller than the sum of its proper divisors (335700).

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

158220 is a wasteful number, since it uses less digits than its factorization.

158220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311 (or 303 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 158220 is about 397.7687770552. The cubic root of 158220 is about 54.0862818176.

It can be divided in two parts, 158 and 220, that added together give a triangular number (378 = T₂₇).

The spelling of 158220 in words is "one hundred fifty-eight thousand, two hundred twenty".