138982608 has 80 divisors (see below), whose sum is σ = 400391040. Its totient is φ = 46158336.

The previous prime is 138982559. The next prime is 138982643. The reversal of 138982608 is 806289831.

138982608 is a `hidden beast` number, since 1 + 38 + 9 + 8 + 2 + 608 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 186685 + ... + 187427.

It is an arithmetic number, because the mean of its divisors is an integer number (5004888).

Almost surely, 2^138982608 is an apocalyptic number.

138982608 is a gapful number since it is divisible by the number (18) 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 138982608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (200195520).

138982608 is an abundant number, since it is smaller than the sum of its proper divisors (261408432).

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

138982608 is a wasteful number, since it uses less digits than its factorization.

138982608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1193 (or 1181 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The square root of 138982608 is about 11789.0885143848. The cubic root of 138982608 is about 517.9885409628.

The spelling of 138982608 in words is "one hundred thirty-eight million, nine hundred eighty-two thousand, six hundred eight".