8138256 has 80 divisors (see below), whose sum is σ = 24534144. Its totient is φ = 2276352.

The previous prime is 8138243. The next prime is 8138279. The reversal of 8138256 is 6528318.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17580 + ... + 18036.

Almost surely, 2^8138256 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 8138256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12267072).

8138256 is an abundant number, since it is smaller than the sum of its proper divisors (16395888).

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

8138256 is a wasteful number, since it uses less digits than its factorization.

8138256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528 (or 522 counting only the distinct ones).

The product of its digits is 11520, while the sum is 33.

The square root of 8138256 is about 2852.7628713232. The cubic root of 8138256 is about 201.1455592754.

The spelling of 8138256 in words is "eight million, one hundred thirty-eight thousand, two hundred fifty-six".