138008560 has 40 divisors (see below), whose sum is σ = 321854400. Its totient is φ = 55034112.

The previous prime is 138008539. The next prime is 138008573. The reversal of 138008560 is 65800831.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25449 + ... + 30391.

It is an arithmetic number, because the mean of its divisors is an integer number (8046360).

Almost surely, 2^138008560 is an apocalyptic number.

138008560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138008560 is an abundant number, since it is smaller than the sum of its proper divisors (183845840).

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

138008560 is a wasteful number, since it uses less digits than its factorization.

138008560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5305 (or 5299 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 138008560 is about 11747.7044566162. The cubic root of 138008560 is about 516.7756098168.

The spelling of 138008560 in words is "one hundred thirty-eight million, eight thousand, five hundred sixty".