158979840 has 144 divisors (see below), whose sum is σ = 534710400. Its totient is φ = 40144896.

The previous prime is 158979839. The next prime is 158979881. The reversal of 158979840 is 48979851.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71871 + ... + 74049.

Almost surely, 2^158979840 is an apocalyptic number.

158979840 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 158979840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (267355200).

158979840 is an abundant number, since it is smaller than the sum of its proper divisors (375730560).

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

158979840 is a wasteful number, since it uses less digits than its factorization.

158979840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2222 (or 2208 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 51.

The square root of 158979840 is about 12608.7207915791. The cubic root of 158979840 is about 541.7272539198.

The spelling of 158979840 in words is "one hundred fifty-eight million, nine hundred seventy-nine thousand, eight hundred forty".