138987192 has 16 divisors (see below), whose sum is σ = 347468040. Its totient is φ = 46329056.

The previous prime is 138987181. The next prime is 138987217. The reversal of 138987192 is 291789831.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2895543 + ... + 2895590.

Almost surely, 2^138987192 is an apocalyptic number.

138987192 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

138987192 is an abundant number, since it is smaller than the sum of its proper divisors (208480848).

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

138987192 is a wasteful number, since it uses less digits than its factorization.

138987192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5791142 (or 5791138 counting only the distinct ones).

The product of its digits is 217728, while the sum is 48.

The square root of 138987192 is about 11789.2829298478. The cubic root of 138987192 is about 517.9942357602.

The spelling of 138987192 in words is "one hundred thirty-eight million, nine hundred eighty-seven thousand, one hundred ninety-two".