158644 has 12 divisors (see below), whose sum is σ = 294084. Its totient is φ = 74624.

The previous prime is 158633. The next prime is 158647. The reversal of 158644 is 446851.

It can be written as a sum of positive squares in 2 ways, for example, as 90000 + 68644 = 300^2 + 262^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1099 + ... + 1234.

It is an arithmetic number, because the mean of its divisors is an integer number (24507).

2¹⁵⁸⁶⁴⁴ is an apocalyptic number.

It is an amenable number.

158644 is a deficient number, since it is larger than the sum of its proper divisors (135440).

158644 is a wasteful number, since it uses less digits than its factorization.

158644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2354 (or 2352 counting only the distinct ones).

The product of its digits is 3840, while the sum is 28.

The square root of 158644 is about 398.3013934196. The cubic root of 158644 is about 54.1345524301.

The spelling of 158644 in words is "one hundred fifty-eight thousand, six hundred forty-four".