158138686 has 8 divisors (see below), whose sum is σ = 237375864. Its totient is φ = 79013400.

The previous prime is 158138647. The next prime is 158138699. The reversal of 158138686 is 686831851.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

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, 24345 + ... + 30148.

It is an arithmetic number, because the mean of its divisors is an integer number (29671983).

Almost surely, 2^158138686 is an apocalyptic number.

158138686 is a deficient number, since it is larger than the sum of its proper divisors (79237178).

158138686 is a wasteful number, since it uses less digits than its factorization.

158138686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55946.

The product of its digits is 276480, while the sum is 46.

The square root of 158138686 is about 12575.3205128140. The cubic root of 158138686 is about 540.7701470944.

The spelling of 158138686 in words is "one hundred fifty-eight million, one hundred thirty-eight thousand, six hundred eighty-six".