138607308 has 48 divisors (see below), whose sum is σ = 410690560. Its totient is φ = 39601872.

The previous prime is 138607297. The next prime is 138607319. The reversal of 138607308 is 803706831.

138607308 is a `hidden beast` number, since 13 + 8 + 607 + 30 + 8 = 666.

138607308 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (138607297) and next prime (138607319).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90916 + ... + 92427.

Almost surely, 2^138607308 is an apocalyptic number.

138607308 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

138607308 is an abundant number, since it is smaller than the sum of its proper divisors (272083252).

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

138607308 is a wasteful number, since it uses less digits than its factorization.

138607308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183363 (or 183355 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 138607308 is about 11773.1604932575. The cubic root of 138607308 is about 517.5218726315.

The spelling of 138607308 in words is "one hundred thirty-eight million, six hundred seven thousand, three hundred eight".