158686728 has 32 divisors (see below), whose sum is σ = 406395360. Its totient is φ = 51605120.

The previous prime is 158686663. The next prime is 158686739. The reversal of 158686728 is 827686851.

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 7 ways as a sum of consecutive naturals, for example, 79650 + ... + 81617.

It is an arithmetic number, because the mean of its divisors is an integer number (12699855).

Almost surely, 2^158686728 is an apocalyptic number.

It is an amenable number.

158686728 is an abundant number, since it is smaller than the sum of its proper divisors (247708632).

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

158686728 is a wasteful number, since it uses less digits than its factorization.

158686728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161317 (or 161313 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 51.

The square root of 158686728 is about 12597.0920453889. The cubic root of 158686728 is about 541.3941206028.

The spelling of 158686728 in words is "one hundred fifty-eight million, six hundred eighty-six thousand, seven hundred twenty-eight".