138981296 has 20 divisors (see below), whose sum is σ = 269466384. Its totient is φ = 69441600.

The previous prime is 138981281. The next prime is 138981313. The reversal of 138981296 is 692189831.

It is a self number, because there is not a number n which added to its sum of digits gives 138981296.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33581 + ... + 37491.

Almost surely, 2^138981296 is an apocalyptic number.

138981296 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

138981296 is a deficient number, since it is larger than the sum of its proper divisors (130485088).

138981296 is a wasteful number, since it uses less digits than its factorization.

138981296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6140 (or 6134 counting only the distinct ones).

The product of its digits is 186624, while the sum is 47.

The square root of 138981296 is about 11789.0328695784. The cubic root of 138981296 is about 517.9869110153.

The spelling of 138981296 in words is "one hundred thirty-eight million, nine hundred eighty-one thousand, two hundred ninety-six".