138827264 has 40 divisors (see below), whose sum is σ = 289468080. Its totient is φ = 66390016.

The previous prime is 138827191. The next prime is 138827291. The reversal of 138827264 is 462728831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5882 + ... + 17670.

It is an arithmetic number, because the mean of its divisors is an integer number (7236702).

Almost surely, 2^138827264 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138827264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144734040).

138827264 is an abundant number, since it is smaller than the sum of its proper divisors (150640816).

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

138827264 is an equidigital number, since it uses as much as digits as its factorization.

138827264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11830 (or 11814 counting only the distinct ones).

The product of its digits is 129024, while the sum is 41.

The square root of 138827264 is about 11782.4982070866. The cubic root of 138827264 is about 517.7954798516.

The spelling of 138827264 in words is "one hundred thirty-eight million, eight hundred twenty-seven thousand, two hundred sixty-four".