8256420328 has 48 divisors (see below), whose sum is σ = 17660473740. Its totient is φ = 3584839680.

The previous prime is 8256420323. The next prime is 8256420383. The reversal of 8256420328 is 8230246528.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 4791685284 + 3464735044 = 69222^2 + 58862^2 .

It is a super-2 number, since 2×8256420328² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8256420323) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3819568 + ... + 3821728.

Almost surely, 2^8256420328 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 8256420328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8830236870).

8256420328 is an abundant number, since it is smaller than the sum of its proper divisors (9404053412).

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

8256420328 is a wasteful number, since it uses less digits than its factorization.

8256420328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4358 (or 2193 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 40.

The square root of 8256420328 is about 90864.8464919190. The cubic root of 8256420328 is about 2021.1440377609.

The spelling of 8256420328 in words is "eight billion, two hundred fifty-six million, four hundred twenty thousand, three hundred twenty-eight".