158738636 has 18 divisors (see below), whose sum is σ = 323146908. Its totient is φ = 68030760.

The previous prime is 158738633. The next prime is 158738651. The reversal of 158738636 is 636837851.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (158738633) 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 5 ways as a sum of consecutive naturals, for example, 404750 + ... + 405141.

It is an arithmetic number, because the mean of its divisors is an integer number (17952606).

Almost surely, 2^158738636 is an apocalyptic number.

It is an amenable number.

158738636 is an abundant number, since it is smaller than the sum of its proper divisors (164408272).

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

158738636 is a wasteful number, since it uses less digits than its factorization.

158738636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809909 (or 809900 counting only the distinct ones).

The product of its digits is 725760, while the sum is 47.

The square root of 158738636 is about 12599.1521936994. The cubic root of 158738636 is about 541.4531459599.

The spelling of 158738636 in words is "one hundred fifty-eight million, seven hundred thirty-eight thousand, six hundred thirty-six".