138957792 has 192 divisors, whose sum is σ = 413683200. Its totient is φ = 40642560.

The previous prime is 138957769. The next prime is 138957827. The reversal of 138957792 is 297759831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1957117 + ... + 1957187.

It is an arithmetic number, because the mean of its divisors is an integer number (2154600).

Almost surely, 2^138957792 is an apocalyptic number.

138957792 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138957792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (206841600).

138957792 is an abundant number, since it is smaller than the sum of its proper divisors (274725408).

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

138957792 is a wasteful number, since it uses less digits than its factorization.

138957792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169 (or 161 counting only the distinct ones).

The product of its digits is 952560, while the sum is 51.

The square root of 138957792 is about 11788.0359687269. The cubic root of 138957792 is about 517.9577093623.

The spelling of 138957792 in words is "one hundred thirty-eight million, nine hundred fifty-seven thousand, seven hundred ninety-two".