138268264 has 16 divisors (see below), whose sum is σ = 262167300. Its totient is φ = 68356992.

The previous prime is 138268261. The next prime is 138268279. The reversal of 138268264 is 462862831.

138268264 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 136188900 + 2079364 = 11670^2 + 1442^2 .

It is a super-2 number, since 2×138268264² = 38236225659147392, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (138268261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96387 + ... + 97810.

Almost surely, 2^138268264 is an apocalyptic number.

It is an amenable number.

138268264 is a deficient number, since it is larger than the sum of its proper divisors (123899036).

138268264 is a wasteful number, since it uses less digits than its factorization.

138268264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194292 (or 194288 counting only the distinct ones).

The product of its digits is 110592, while the sum is 40.

The square root of 138268264 is about 11758.7526549375. The cubic root of 138268264 is about 517.0995621774.

The spelling of 138268264 in words is "one hundred thirty-eight million, two hundred sixty-eight thousand, two hundred sixty-four".