138983664 has 120 divisors (see below), whose sum is σ = 390082176. Its totient is φ = 42556800.

The previous prime is 138983659. The next prime is 138983683. The reversal of 138983664 is 466389831.

It is a Harshad number since it is a multiple of its sum of digits (48).

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 23 ways as a sum of consecutive naturals, for example, 1060879 + ... + 1061009.

Almost surely, 2^138983664 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 138983664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195041088).

138983664 is an abundant number, since it is smaller than the sum of its proper divisors (251098512).

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

138983664 is a wasteful number, since it uses less digits than its factorization.

138983664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227 (or 190 counting only the distinct ones).

The product of its digits is 746496, while the sum is 48.

The square root of 138983664 is about 11789.1333014773. The cubic root of 138983664 is about 517.9898528644.

The spelling of 138983664 in words is "one hundred thirty-eight million, nine hundred eighty-three thousand, six hundred sixty-four".