138791352 has 64 divisors (see below), whose sum is σ = 417427200. Its totient is φ = 37566720.

The previous prime is 138791347. The next prime is 138791353. The reversal of 138791352 is 253197831.

It is a self number, because there is not a number n which added to its sum of digits gives 138791352.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138791353) 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, 18549 + ... + 24932.

It is an arithmetic number, because the mean of its divisors is an integer number (6522300).

Almost surely, 2^138791352 is an apocalyptic number.

138791352 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

138791352 is an abundant number, since it is smaller than the sum of its proper divisors (278635848).

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

138791352 is a wasteful number, since it uses less digits than its factorization.

138791352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43516 (or 43512 counting only the distinct ones).

The product of its digits is 45360, while the sum is 39.

The square root of 138791352 is about 11780.9741532693. The cubic root of 138791352 is about 517.7508280198.

The spelling of 138791352 in words is "one hundred thirty-eight million, seven hundred ninety-one thousand, three hundred fifty-two".