36158139 has 24 divisors (see below), whose sum is σ = 55984032. Its totient is φ = 22429440.

The previous prime is 36158117. The next prime is 36158147. The reversal of 36158139 is 93185163.

It is a happy number.

36158139 is a `hidden beast` number, since 3 + 615 + 8 + 1 + 39 = 666.

It is not a de Polignac number, because 36158139 - 2⁵ = 36158107 is a prime.

It is a super-2 number, since 2×36158139² = 2614822031886642, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (36158939) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5299 + ... + 10019.

It is an arithmetic number, because the mean of its divisors is an integer number (2332668).

Almost surely, 2^36158139 is an apocalyptic number.

36158139 is a deficient number, since it is larger than the sum of its proper divisors (19825893).

36158139 is a wasteful number, since it uses less digits than its factorization.

36158139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4787 (or 4784 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 36158139 is about 6013.1638095099. The cubic root of 36158139 is about 330.6755033670.

The spelling of 36158139 in words is "thirty-six million, one hundred fifty-eight thousand, one hundred thirty-nine".