138731352 has 32 divisors (see below), whose sum is σ = 356204400. Its totient is φ = 44993664.

The previous prime is 138731311. The next prime is 138731353. The reversal of 138731352 is 253137831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138731353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77227 + ... + 79002.

Almost surely, 2^138731352 is an apocalyptic number.

138731352 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

138731352 is an abundant number, since it is smaller than the sum of its proper divisors (217473048).

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

138731352 is a wasteful number, since it uses less digits than its factorization.

138731352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156275 (or 156271 counting only the distinct ones).

The product of its digits is 15120, while the sum is 33.

The square root of 138731352 is about 11778.4273992753. The cubic root of 138731352 is about 517.6762087518.

It can be divided in two parts, 13873 and 1352, that added together give a triangular number (15225 = T₁₇₄).

The spelling of 138731352 in words is "one hundred thirty-eight million, seven hundred thirty-one thousand, three hundred fifty-two".