138450732 has 24 divisors (see below), whose sum is σ = 369202176. Its totient is φ = 39557328.

The previous prime is 138450677. The next prime is 138450751. The reversal of 138450732 is 237054831.

It is a junction number, because it is equal to n+sod(n) for n = 138450693 and 138450702.

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, 824028 + ... + 824195.

It is an arithmetic number, because the mean of its divisors is an integer number (15383424).

Almost surely, 2^138450732 is an apocalyptic number.

138450732 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

138450732 is an abundant number, since it is smaller than the sum of its proper divisors (230751444).

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

138450732 is a wasteful number, since it uses less digits than its factorization.

138450732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1648237 (or 1648235 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 138450732 is about 11766.5089130124. The cubic root of 138450732 is about 517.3269285189.

The spelling of 138450732 in words is "one hundred thirty-eight million, four hundred fifty thousand, seven hundred thirty-two".