256322274 has 48 divisors (see below), whose sum is σ = 582728832. Its totient is φ = 74709216.

The previous prime is 256322267. The next prime is 256322279. The reversal of 256322274 is 472223652.

It is a super-2 number, since 2×256322274² = 131402216297062152, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (256322279) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23607 + ... + 32709.

It is an arithmetic number, because the mean of its divisors is an integer number (12140184).

Almost surely, 2^256322274 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256322274, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (291364416).

256322274 is an abundant number, since it is smaller than the sum of its proper divisors (326406558).

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

256322274 is a wasteful number, since it uses less digits than its factorization.

256322274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9159 (or 9140 counting only the distinct ones).

The product of its digits is 40320, while the sum is 33.

The square root of 256322274 is about 16010.0678949216. The cubic root of 256322274 is about 635.2267559770.

The spelling of 256322274 in words is "two hundred fifty-six million, three hundred twenty-two thousand, two hundred seventy-four".