138345132 has 12 divisors (see below), whose sum is σ = 322805336. Its totient is φ = 46115040.

The previous prime is 138345113. The next prime is 138345139. The reversal of 138345132 is 231543831.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 138345132.

It is not an unprimeable number, because it can be changed into a prime (138345139) 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, 5764369 + ... + 5764392.

Almost surely, 2^138345132 is an apocalyptic number.

138345132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

138345132 is an abundant number, since it is smaller than the sum of its proper divisors (184460204).

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

138345132 is a wasteful number, since it uses less digits than its factorization.

138345132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11528768 (or 11528766 counting only the distinct ones).

The product of its digits is 8640, while the sum is 30.

The square root of 138345132 is about 11762.0207447530. The cubic root of 138345132 is about 517.1953687987.

Adding to 138345132 its reverse (231543831), we get a palindrome (369888963).

The spelling of 138345132 in words is "one hundred thirty-eight million, three hundred forty-five thousand, one hundred thirty-two".