138568264 has 32 divisors (see below), whose sum is σ = 277459200. Its totient is φ = 64733760.

The previous prime is 138568259. The next prime is 138568279. The reversal of 138568264 is 462865831.

138568264 is nontrivially palindromic in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 138568264.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2442 + ... + 16825.

It is an arithmetic number, because the mean of its divisors is an integer number (8670600).

Almost surely, 2^138568264 is an apocalyptic number.

It is an amenable number.

138568264 is an abundant number, since it is smaller than the sum of its proper divisors (138890936).

138568264 is a wasteful number, since it uses less digits than its factorization.

138568264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19333 (or 19329 counting only the distinct ones).

The product of its digits is 276480, while the sum is 43.

The square root of 138568264 is about 11771.5021981054. The cubic root of 138568264 is about 517.4732748535.

The spelling of 138568264 in words is "one hundred thirty-eight million, five hundred sixty-eight thousand, two hundred sixty-four".