138263132 has 24 divisors (see below), whose sum is σ = 277726176. Its totient is φ = 58998528.

The previous prime is 138263129. The next prime is 138263179. The reversal of 138263132 is 231362831.

It is a junction number, because it is equal to n+sod(n) for n = 138263095 and 138263104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4073 + ... + 17120.

It is an arithmetic number, because the mean of its divisors is an integer number (11571924).

Almost surely, 2^138263132 is an apocalyptic number.

It is an amenable number.

138263132 is an abundant number, since it is smaller than the sum of its proper divisors (139463044).

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

138263132 is a wasteful number, since it uses less digits than its factorization.

138263132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21437 (or 21435 counting only the distinct ones).

The product of its digits is 5184, while the sum is 29.

The square root of 138263132 is about 11758.5344324877. The cubic root of 138263132 is about 517.0931644987.

The spelling of 138263132 in words is "one hundred thirty-eight million, two hundred sixty-three thousand, one hundred thirty-two".