138545260 has 48 divisors (see below), whose sum is σ = 336542976. Its totient is φ = 46924992.

The previous prime is 138545171. The next prime is 138545287. The reversal of 138545260 is 62545831.

138545260 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5659 + ... + 17581.

It is an arithmetic number, because the mean of its divisors is an integer number (7011312).

Almost surely, 2^138545260 is an apocalyptic number.

138545260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138545260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (168271488).

138545260 is an abundant number, since it is smaller than the sum of its proper divisors (197997716).

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

138545260 is a wasteful number, since it uses less digits than its factorization.

138545260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12022 (or 12020 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 138545260 is about 11770.5250520102. The cubic root of 138545260 is about 517.4446376709. Note that the first 3 decimals are identical.

The spelling of 138545260 in words is "one hundred thirty-eight million, five hundred forty-five thousand, two hundred sixty".