138582276 has 96 divisors (see below), whose sum is σ = 401694720. Its totient is φ = 36288000.

The previous prime is 138582239. The next prime is 138582281. The reversal of 138582276 is 672285831.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48076 + ... + 50876.

It is an arithmetic number, because the mean of its divisors is an integer number (4184320).

Almost surely, 2^138582276 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 138582276, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (200847360).

138582276 is an abundant number, since it is smaller than the sum of its proper divisors (263112444).

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

138582276 is a wasteful number, since it uses less digits than its factorization.

138582276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2865 (or 2863 counting only the distinct ones).

The product of its digits is 161280, while the sum is 42.

The square root of 138582276 is about 11772.0973492407. The cubic root of 138582276 is about 517.4907165363.

The spelling of 138582276 in words is "one hundred thirty-eight million, five hundred eighty-two thousand, two hundred seventy-six".