138633568 has 12 divisors (see below), whose sum is σ = 272934900. Its totient is φ = 69316768.

The previous prime is 138633559. The next prime is 138633629. The reversal of 138633568 is 865336831.

It is a super-3 number, since 3×138633568³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2166118 + ... + 2166181.

It is an arithmetic number, because the mean of its divisors is an integer number (22744575).

Almost surely, 2^138633568 is an apocalyptic number.

It is an amenable number.

138633568 is a deficient number, since it is larger than the sum of its proper divisors (134301332).

138633568 is an equidigital number, since it uses as much as digits as its factorization.

138633568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4332309 (or 4332301 counting only the distinct ones).

The product of its digits is 311040, while the sum is 43.

The square root of 138633568 is about 11774.2756889755. The cubic root of 138633568 is about 517.5545531263.

The spelling of 138633568 in words is "one hundred thirty-eight million, six hundred thirty-three thousand, five hundred sixty-eight".