138565712 has 40 divisors (see below), whose sum is σ = 278747040. Its totient is φ = 66648960.

The previous prime is 138565699. The next prime is 138565723. The reversal of 138565712 is 217565831.

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, 242387 + ... + 242957.

It is an arithmetic number, because the mean of its divisors is an integer number (6968676).

Almost surely, 2^138565712 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 138565712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139373520).

138565712 is an abundant number, since it is smaller than the sum of its proper divisors (140181328).

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

138565712 is a wasteful number, since it uses less digits than its factorization.

138565712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1131 (or 1125 counting only the distinct ones).

The product of its digits is 50400, while the sum is 38.

The square root of 138565712 is about 11771.3938002260. The cubic root of 138565712 is about 517.4700980801.

The spelling of 138565712 in words is "one hundred thirty-eight million, five hundred sixty-five thousand, seven hundred twelve".