138080320 has 56 divisors (see below), whose sum is σ = 375781824. Its totient is φ = 47341056.

The previous prime is 138080297. The next prime is 138080321. The reversal of 138080320 is 23080831.

It is a tau number, because it is divible by the number of its divisors (56).

It is not an unprimeable number, because it can be changed into a prime (138080321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28582 + ... + 33061.

Almost surely, 2^138080320 is an apocalyptic number.

138080320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138080320 is an abundant number, since it is smaller than the sum of its proper divisors (237701504).

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

138080320 is an equidigital number, since it uses as much as digits as its factorization.

138080320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61667 (or 61657 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 138080320 is about 11750.7582734052. The cubic root of 138080320 is about 516.8651631801.

The spelling of 138080320 in words is "one hundred thirty-eight million, eighty thousand, three hundred twenty".