138196536 has 32 divisors (see below), whose sum is σ = 365815440. Its totient is φ = 43355648.

The previous prime is 138196507. The next prime is 138196547. The reversal of 138196536 is 635691831.

It is a happy number.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

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 7 ways as a sum of consecutive naturals, for example, 168951 + ... + 169766.

Almost surely, 2^138196536 is an apocalyptic number.

It is an amenable number.

138196536 is an abundant number, since it is smaller than the sum of its proper divisors (227618904).

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

138196536 is a wasteful number, since it uses less digits than its factorization.

138196536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338743 (or 338739 counting only the distinct ones).

The product of its digits is 116640, while the sum is 42.

The square root of 138196536 is about 11755.7022759170. The cubic root of 138196536 is about 517.0101299104.

The spelling of 138196536 in words is "one hundred thirty-eight million, one hundred ninety-six thousand, five hundred thirty-six".