138392672 has 24 divisors (see below), whose sum is σ = 297230472. Its totient is φ = 62905600.

The previous prime is 138392663. The next prime is 138392689. The reversal of 138392672 is 276293831.

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, 196229 + ... + 196932.

It is an arithmetic number, because the mean of its divisors is an integer number (12384603).

Almost surely, 2^138392672 is an apocalyptic number.

It is an amenable number.

138392672 is an abundant number, since it is smaller than the sum of its proper divisors (158837800).

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

138392672 is a wasteful number, since it uses less digits than its factorization.

138392672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393182 (or 393174 counting only the distinct ones).

The product of its digits is 108864, while the sum is 41.

The square root of 138392672 is about 11764.0414824158. The cubic root of 138392672 is about 517.2546038717.

The spelling of 138392672 in words is "one hundred thirty-eight million, three hundred ninety-two thousand, six hundred seventy-two".