138265456 has 60 divisors (see below), whose sum is σ = 321735360. Its totient is φ = 57335040.

The previous prime is 138265447. The next prime is 138265483. The reversal of 138265456 is 654562831.

It is a super-4 number, since 4×138265456⁴ (a number of 34 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21460 + ... + 27148.

It is an arithmetic number, because the mean of its divisors is an integer number (5362256).

Almost surely, 2^138265456 is an apocalyptic number.

138265456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138265456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (160867680).

138265456 is an abundant number, since it is smaller than the sum of its proper divisors (183469904).

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

138265456 is a wasteful number, since it uses less digits than its factorization.

138265456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5742 (or 5729 counting only the distinct ones).

The product of its digits is 172800, while the sum is 40.

The square root of 138265456 is about 11758.6332539118. The cubic root of 138265456 is about 517.0960616745.

The spelling of 138265456 in words is "one hundred thirty-eight million, two hundred sixty-five thousand, four hundred fifty-six".