138481732 has 12 divisors (see below), whose sum is σ = 246450960. Its totient is φ = 68067176.

The previous prime is 138481727. The next prime is 138481753. The reversal of 138481732 is 237184831.

It is a junction number, because it is equal to n+sod(n) for n = 138481691 and 138481700.

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, 293158 + ... + 293629.

It is an arithmetic number, because the mean of its divisors is an integer number (20537580).

Almost surely, 2^138481732 is an apocalyptic number.

It is an amenable number.

138481732 is a deficient number, since it is larger than the sum of its proper divisors (107969228).

138481732 is a wasteful number, since it uses less digits than its factorization.

138481732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 586850 (or 586848 counting only the distinct ones).

The product of its digits is 32256, while the sum is 37.

The square root of 138481732 is about 11767.8261373968. The cubic root of 138481732 is about 517.3655365681.

The spelling of 138481732 in words is "one hundred thirty-eight million, four hundred eighty-one thousand, seven hundred thirty-two".