138556336 has 40 divisors (see below), whose sum is σ = 273720080. Its totient is φ = 67931136.

The previous prime is 138556291. The next prime is 138556339. The reversal of 138556336 is 633655831.

It is not an unprimeable number, because it can be changed into a prime (138556339) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 365395 + ... + 365773.

It is an arithmetic number, because the mean of its divisors is an integer number (6843002).

Almost surely, 2^138556336 is an apocalyptic number.

138556336 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

138556336 is a deficient number, since it is larger than the sum of its proper divisors (135163744).

138556336 is a wasteful number, since it uses less digits than its factorization.

138556336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 773 (or 767 counting only the distinct ones).

The product of its digits is 194400, while the sum is 40.

The square root of 138556336 is about 11770.9955398853. The cubic root of 138556336 is about 517.4584263397.

The spelling of 138556336 in words is "one hundred thirty-eight million, five hundred fifty-six thousand, three hundred thirty-six".