158992 has 20 divisors (see below), whose sum is σ = 324880. Its totient is φ = 75168.

The previous prime is 158981. The next prime is 158993. The reversal of 158992 is 299851.

It is not an unprimeable number, because it can be changed into a prime (158993) 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 3 ways as a sum of consecutive naturals, for example, 43 + ... + 565.

It is an arithmetic number, because the mean of its divisors is an integer number (16244).

2¹⁵⁸⁹⁹² is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 158992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162440).

158992 is an abundant number, since it is smaller than the sum of its proper divisors (165888).

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

158992 is a wasteful number, since it uses less digits than its factorization.

158992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550 (or 544 counting only the distinct ones).

The product of its digits is 6480, while the sum is 34.

The square root of 158992 is about 398.7380092241. The cubic root of 158992 is about 54.1741065389.

It can be divided in two parts, 1589 and 92, that added together give a square (1681 = 41²).

The spelling of 158992 in words is "one hundred fifty-eight thousand, nine hundred ninety-two".