817326256 has 40 divisors (see below), whose sum is σ = 1641993120. Its totient is φ = 393652224.

The previous prime is 817326203. The next prime is 817326269. The reversal of 817326256 is 652623718.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 224160 + ... + 227776.

It is an arithmetic number, because the mean of its divisors is an integer number (41049828).

Almost surely, 2^817326256 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 817326256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (820996560).

817326256 is an abundant number, since it is smaller than the sum of its proper divisors (824666864).

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

817326256 is a wasteful number, since it uses less digits than its factorization.

817326256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4141 (or 4135 counting only the distinct ones).

The product of its digits is 120960, while the sum is 40.

The square root of 817326256 is about 28588.9184125598. The cubic root of 817326256 is about 934.9717383052.

The spelling of 817326256 in words is "eight hundred seventeen million, three hundred twenty-six thousand, two hundred fifty-six".