138465480 has 64 divisors (see below), whose sum is σ = 416223360. Its totient is φ = 36850688.

The previous prime is 138465479. The next prime is 138465511. The reversal of 138465480 is 84564831.

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, 88384 + ... + 89936.

It is an arithmetic number, because the mean of its divisors is an integer number (6503490).

Almost surely, 2^138465480 is an apocalyptic number.

138465480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138465480 is an abundant number, since it is smaller than the sum of its proper divisors (277757880).

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

138465480 is a wasteful number, since it uses less digits than its factorization.

138465480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2310 (or 2306 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 39.

The square root of 138465480 is about 11767.1355902785. The cubic root of 138465480 is about 517.3452967055.

The spelling of 138465480 in words is "one hundred thirty-eight million, four hundred sixty-five thousand, four hundred eighty".