138883668 has 192 divisors, whose sum is σ = 429649920. Its totient is φ = 33868800.

The previous prime is 138883649. The next prime is 138883757. The reversal of 138883668 is 866388831.

It is a self number, because there is not a number n which added to its sum of digits gives 138883668.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1902480 + ... + 1902552.

It is an arithmetic number, because the mean of its divisors is an integer number (2237760).

Almost surely, 2^138883668 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138883668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (214824960).

138883668 is an abundant number, since it is smaller than the sum of its proper divisors (290766252).

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

138883668 is a wasteful number, since it uses less digits than its factorization.

138883668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198 (or 196 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 51.

The square root of 138883668 is about 11784.8915141379. The cubic root of 138883668 is about 517.8655952381.

The spelling of 138883668 in words is "one hundred thirty-eight million, eight hundred eighty-three thousand, six hundred sixty-eight".