138630268 has 24 divisors (see below), whose sum is σ = 284756192. Its totient is φ = 57806784.

The previous prime is 138630221. The next prime is 138630281. The reversal of 138630268 is 862036831.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

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, 65871 + ... + 67942.

Almost surely, 2^138630268 is an apocalyptic number.

It is an amenable number.

138630268 is an abundant number, since it is smaller than the sum of its proper divisors (146125924).

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

138630268 is a wasteful number, since it uses less digits than its factorization.

138630268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133861 (or 133859 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 138630268 is about 11774.1355521329. The cubic root of 138630268 is about 517.5504465125.

The spelling of 138630268 in words is "one hundred thirty-eight million, six hundred thirty thousand, two hundred sixty-eight".