158381864 has 64 divisors (see below), whose sum is σ = 320336640. Its totient is φ = 73244160.

The previous prime is 158381863. The next prime is 158381897. The reversal of 158381864 is 468183851.

It is a happy number.

It is a super-2 number, since 2×158381864² = 50169629688228992, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (158381863) by changing a digit.

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, 1156004 + ... + 1156140.

It is an arithmetic number, because the mean of its divisors is an integer number (5005260).

Almost surely, 2^158381864 is an apocalyptic number.

It is an amenable number.

158381864 is an abundant number, since it is smaller than the sum of its proper divisors (161954776).

158381864 is a wasteful number, since it uses less digits than its factorization.

158381864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330 (or 326 counting only the distinct ones).

The product of its digits is 184320, while the sum is 44.

The square root of 158381864 is about 12584.9856575206. The cubic root of 158381864 is about 541.0471951657.

The spelling of 158381864 in words is "one hundred fifty-eight million, three hundred eighty-one thousand, eight hundred sixty-four".