4320256 has 22 divisors (see below), whose sum is σ = 8638340. Its totient is φ = 2159616.

The previous prime is 4320247. The next prime is 4320257. The reversal of 4320256 is 6520234.

It is a happy number.

It is a super-2 number, since 2×4320256² = 37329223811072, which contains 22 as substring.

It is a d-powerful number, because it can be written as 4⁹ + 3³ + 2⁵ + 0 + 2²¹ + 5⁹ + 6⁵ .

It is not an unprimeable number, because it can be changed into a prime (4320257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1086 + ... + 3133.

Almost surely, 2^4320256 is an apocalyptic number.

It is an amenable number.

4320256 is a deficient number, since it is larger than the sum of its proper divisors (4318084).

4320256 is an equidigital number, since it uses as much as digits as its factorization.

4320256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4239 (or 4221 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 4320256 is about 2078.5225521990. The cubic root of 4320256 is about 162.8682740197.

Subtracting from 4320256 its sum of digits (22), we obtain a palindrome (4320234).

The spelling of 4320256 in words is "four million, three hundred twenty thousand, two hundred fifty-six".