138680378 has 8 divisors (see below), whose sum is σ = 215193780. Its totient is φ = 66949120.

The previous prime is 138680369. The next prime is 138680387. The reversal of 138680378 is 873086831.

It is an interprime number because it is at equal distance from previous prime (138680369) and next prime (138680387).

It can be written as a sum of positive squares in 2 ways, for example, as 138462289 + 218089 = 11767^2 + 467^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1195463 + ... + 1195578.

Almost surely, 2^138680378 is an apocalyptic number.

138680378 is a deficient number, since it is larger than the sum of its proper divisors (76513402).

138680378 is a wasteful number, since it uses less digits than its factorization.

138680378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2391072.

The product of its (nonzero) digits is 193536, while the sum is 44.

The square root of 138680378 is about 11776.2633292569. The cubic root of 138680378 is about 517.6127978039.

The spelling of 138680378 in words is "one hundred thirty-eight million, six hundred eighty thousand, three hundred seventy-eight".