138599264 has 36 divisors (see below), whose sum is σ = 282015972. Its totient is φ = 67049280.

The previous prime is 138599257. The next prime is 138599297. The reversal of 138599264 is 462995831.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28499 + ... + 33005.

It is an arithmetic number, because the mean of its divisors is an integer number (7833777).

Almost surely, 2^138599264 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 138599264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141007986).

138599264 is an abundant number, since it is smaller than the sum of its proper divisors (143416708).

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

138599264 is an equidigital number, since it uses as much as digits as its factorization.

138599264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4579 (or 4540 counting only the distinct ones).

The product of its digits is 466560, while the sum is 47.

The square root of 138599264 is about 11772.8188638066. The cubic root of 138599264 is about 517.5118610707.

The spelling of 138599264 in words is "one hundred thirty-eight million, five hundred ninety-nine thousand, two hundred sixty-four".