138492392 has 16 divisors (see below), whose sum is σ = 264573540. Its totient is φ = 67939456.

The previous prime is 138492391. The next prime is 138492397. The reversal of 138492392 is 293294831.

It can be written as a sum of positive squares in 2 ways, for example, as 127825636 + 10666756 = 11306^2 + 3266^2 .

It is not an unprimeable number, because it can be changed into a prime (138492391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162893 + ... + 163740.

Almost surely, 2^138492392 is an apocalyptic number.

It is an amenable number.

138492392 is a deficient number, since it is larger than the sum of its proper divisors (126081148).

138492392 is a wasteful number, since it uses less digits than its factorization.

138492392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326692 (or 326688 counting only the distinct ones).

The product of its digits is 93312, while the sum is 41.

The square root of 138492392 is about 11768.2790585540. The cubic root of 138492392 is about 517.3788114240.

The spelling of 138492392 in words is "one hundred thirty-eight million, four hundred ninety-two thousand, three hundred ninety-two".