138484312 has 32 divisors (see below), whose sum is σ = 289407600. Its totient is φ = 61737984.

The previous prime is 138484289. The next prime is 138484321. The reversal of 138484312 is 213484831.

It is a super-2 number, since 2×138484312² = 38355809340226688, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34).

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, 24213 + ... + 29380.

Almost surely, 2^138484312 is an apocalyptic number.

It is an amenable number.

138484312 is an abundant number, since it is smaller than the sum of its proper divisors (150923288).

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

138484312 is a wasteful number, since it uses less digits than its factorization.

138484312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53635 (or 53631 counting only the distinct ones).

The product of its digits is 18432, while the sum is 34.

The square root of 138484312 is about 11767.9357578124. The cubic root of 138484312 is about 517.3687494944.

The spelling of 138484312 in words is "one hundred thirty-eight million, four hundred eighty-four thousand, three hundred twelve".