138500480 has 96 divisors (see below), whose sum is σ = 349097040. Its totient is φ = 52445184.

The previous prime is 138500477. The next prime is 138500489. The reversal of 138500480 is 84005831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138500489) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1427792 + ... + 1427888.

Almost surely, 2^138500480 is an apocalyptic number.

138500480 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 138500480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174548520).

138500480 is an abundant number, since it is smaller than the sum of its proper divisors (210596560).

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

138500480 is an frugal number, since it uses more digits than its factorization.

138500480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236 (or 127 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 138500480 is about 11768.6226891680. The cubic root of 138500480 is about 517.3888829239.

The spelling of 138500480 in words is "one hundred thirty-eight million, five hundred thousand, four hundred eighty".