158691404 has 12 divisors (see below), whose sum is σ = 277806144. Its totient is φ = 79318224.

The previous prime is 158691397. The next prime is 158691427. The reversal of 158691404 is 404196851.

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 3 ways as a sum of consecutive naturals, for example, 11702 + ... + 21314.

It is an arithmetic number, because the mean of its divisors is an integer number (23150512).

Almost surely, 2^158691404 is an apocalyptic number.

It is an amenable number.

158691404 is a deficient number, since it is larger than the sum of its proper divisors (119114740).

158691404 is a wasteful number, since it uses less digits than its factorization.

158691404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13744 (or 13742 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 158691404 is about 12597.2776424115. The cubic root of 158691404 is about 541.3994382793.

The spelling of 158691404 in words is "one hundred fifty-eight million, six hundred ninety-one thousand, four hundred four".