8243856 has 50 divisors (see below), whose sum is σ = 23863862. Its totient is φ = 2747520.

The previous prime is 8243849. The next prime is 8243857. The reversal of 8243856 is 6583428.

8243856 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 6170256 + 2073600 = 2484^2 + 1440^2 .

It is a super-2 number, since 2×8243856² = 135922323497472, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a d-powerful number, because it can be written as 8 + 2²¹ + 4¹¹ + 3¹³ + 8 + 5⁷ + 6⁷ .

It is a self number, because there is not a number n which added to its sum of digits gives 8243856.

It is not an unprimeable number, because it can be changed into a prime (8243857) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1885 + ... + 4476.

Almost surely, 2^8243856 is an apocalyptic number.

It is an amenable number.

8243856 is an abundant number, since it is smaller than the sum of its proper divisors (15620006).

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

8243856 is a wasteful number, since it uses less digits than its factorization.

8243856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6381 (or 6366 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 8243856 is about 2871.2115909490. The cubic root of 8243856 is about 202.0118282130.

The spelling of 8243856 in words is "eight million, two hundred forty-three thousand, eight hundred fifty-six".