138631364 has 12 divisors (see below), whose sum is σ = 242729004. Its totient is φ = 69280224.

The previous prime is 138631357. The next prime is 138631369. The reversal of 138631364 is 463136831.

It can be written as a sum of positive squares in 2 ways, for example, as 51955264 + 86676100 = 7208^2 + 9310^2 .

It is not an unprimeable number, because it can be changed into a prime (138631369) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1202 + ... + 16694.

It is an arithmetic number, because the mean of its divisors is an integer number (20227417).

Almost surely, 2^138631364 is an apocalyptic number.

It is an amenable number.

138631364 is a deficient number, since it is larger than the sum of its proper divisors (104097640).

138631364 is a wasteful number, since it uses less digits than its factorization.

138631364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17734 (or 17732 counting only the distinct ones).

The product of its digits is 31104, while the sum is 35.

The square root of 138631364 is about 11774.1820947359. The cubic root of 138631364 is about 517.5518104133.

The spelling of 138631364 in words is "one hundred thirty-eight million, six hundred thirty-one thousand, three hundred sixty-four".