138719560 has 128 divisors (see below), whose sum is σ = 371589120. Its totient is φ = 45626112.

The previous prime is 138719543. The next prime is 138719563. The reversal of 138719560 is 65917831.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (138719563) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1092217 + ... + 1092343.

It is an arithmetic number, because the mean of its divisors is an integer number (2903040).

Almost surely, 2^138719560 is an apocalyptic number.

138719560 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 138719560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185794560).

138719560 is an abundant number, since it is smaller than the sum of its proper divisors (232869560).

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

138719560 is a wasteful number, since it uses less digits than its factorization.

138719560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275 (or 271 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 138719560 is about 11777.9268124743. The cubic root of 138719560 is about 517.6615410488.

The spelling of 138719560 in words is "one hundred thirty-eight million, seven hundred nineteen thousand, five hundred sixty".