158981388 has 24 divisors (see below), whose sum is σ = 371849520. Its totient is φ = 52866240.

The previous prime is 158981369. The next prime is 158981411. The reversal of 158981388 is 883189851.

It is a self number, because there is not a number n which added to its sum of digits gives 158981388.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10683 + ... + 20786.

It is an arithmetic number, because the mean of its divisors is an integer number (15493730).

Almost surely, 2^158981388 is an apocalyptic number.

It is an amenable number.

158981388 is an abundant number, since it is smaller than the sum of its proper divisors (212868132).

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

158981388 is a wasteful number, since it uses less digits than its factorization.

158981388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31897 (or 31895 counting only the distinct ones).

The product of its digits is 552960, while the sum is 51.

The square root of 158981388 is about 12608.7821775142. The cubic root of 158981388 is about 541.7290121953.

The spelling of 158981388 in words is "one hundred fifty-eight million, nine hundred eighty-one thousand, three hundred eighty-eight".