138413492 has 12 divisors (see below), whose sum is σ = 276827040. Its totient is φ = 59320056.

The previous prime is 138413489. The next prime is 138413497. The reversal of 138413492 is 294314831.

138413492 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138413497) 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, 2471642 + ... + 2471697.

It is an arithmetic number, because the mean of its divisors is an integer number (23068920).

Almost surely, 2^138413492 is an apocalyptic number.

It is an amenable number.

138413492 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

138413492 is a wasteful number, since it uses less digits than its factorization.

138413492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4943350 (or 4943348 counting only the distinct ones).

The product of its digits is 20736, while the sum is 35.

The square root of 138413492 is about 11764.9263491107. The cubic root of 138413492 is about 517.2805414225.

The spelling of 138413492 in words is "one hundred thirty-eight million, four hundred thirteen thousand, four hundred ninety-two".