256056424 has 64 divisors (see below), whose sum is σ = 543594240. Its totient is φ = 112189440.

The previous prime is 256056421. The next prime is 256056461. The reversal of 256056424 is 424650652.

It is a self number, because there is not a number n which added to its sum of digits gives 256056424.

It is not an unprimeable number, because it can be changed into a prime (256056421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 399144 + ... + 399784.

It is an arithmetic number, because the mean of its divisors is an integer number (8493660).

Almost surely, 2^256056424 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 256056424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (271797120).

256056424 is an abundant number, since it is smaller than the sum of its proper divisors (287537816).

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

256056424 is a wasteful number, since it uses less digits than its factorization.

256056424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 850 (or 846 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 34.

The square root of 256056424 is about 16001.7631528529. The cubic root of 256056424 is about 635.0070671088.

The spelling of 256056424 in words is "two hundred fifty-six million, fifty-six thousand, four hundred twenty-four".