158978439 has 24 divisors (see below), whose sum is σ = 235718912. Its totient is φ = 103194000.

The previous prime is 158978423. The next prime is 158978467. The reversal of 158978439 is 934879851.

It is not a de Polignac number, because 158978439 - 2⁴ = 158978423 is a prime.

It is a Duffinian number.

Its product of digits (2177280) is a multiple of the sum of its prime divisors (1344).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158978639) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 211314 + ... + 212064.

Almost surely, 2^158978439 is an apocalyptic number.

158978439 is a deficient number, since it is larger than the sum of its proper divisors (76740473).

158978439 is a wasteful number, since it uses less digits than its factorization.

158978439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1347 (or 1344 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The square root of 158978439 is about 12608.6652346710. The cubic root of 158978439 is about 541.7256626025.

It can be divided in two parts, 15897 and 8439, that added together give a square (24336 = 156²).

The spelling of 158978439 in words is "one hundred fifty-eight million, nine hundred seventy-eight thousand, four hundred thirty-nine".