138782672 has 40 divisors (see below), whose sum is σ = 314462016. Its totient is φ = 58093056.

The previous prime is 138782647. The next prime is 138782711. The reversal of 138782672 is 276287831.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9593 + ... + 19224.

Almost surely, 2^138782672 is an apocalyptic number.

It is an amenable number.

138782672 is an abundant number, since it is smaller than the sum of its proper divisors (175679344).

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

138782672 is a wasteful number, since it uses less digits than its factorization.

138782672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28875 (or 28869 counting only the distinct ones).

The product of its digits is 225792, while the sum is 44.

The square root of 138782672 is about 11780.6057569210. The cubic root of 138782672 is about 517.7400344298.

The spelling of 138782672 in words is "one hundred thirty-eight million, seven hundred eighty-two thousand, six hundred seventy-two".