158138604 has 36 divisors (see below), whose sum is σ = 430489696. Its totient is φ = 48657888.

The previous prime is 158138581. The next prime is 158138611. The reversal of 158138604 is 406831851.

158138604 is a `hidden beast` number, since 15 + 8 + 1 + 38 + 604 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 168484 + ... + 169419.

Almost surely, 2^158138604 is an apocalyptic number.

It is an amenable number.

158138604 is an abundant number, since it is smaller than the sum of its proper divisors (272351092).

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

158138604 is a wasteful number, since it uses less digits than its factorization.

158138604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337926 (or 337921 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 158138604 is about 12575.3172524593. The cubic root of 158138604 is about 540.7700536255.

The spelling of 158138604 in words is "one hundred fifty-eight million, one hundred thirty-eight thousand, six hundred four".