138873592 has 64 divisors (see below), whose sum is σ = 307812960. Its totient is φ = 57907200.

The previous prime is 138873589. The next prime is 138873593. The reversal of 138873592 is 295378831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138873593) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 266292 + ... + 266812.

Almost surely, 2^138873592 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138873592, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153906480).

138873592 is an abundant number, since it is smaller than the sum of its proper divisors (168939368).

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

138873592 is a wasteful number, since it uses less digits than its factorization.

138873592 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 784 (or 780 counting only the distinct ones).

The product of its digits is 362880, while the sum is 46.

The square root of 138873592 is about 11784.4640098733. The cubic root of 138873592 is about 517.8530712314.

The spelling of 138873592 in words is "one hundred thirty-eight million, eight hundred seventy-three thousand, five hundred ninety-two".