256222746 has 24 divisors (see below), whose sum is σ = 597853620. Its totient is φ = 78837696.

The previous prime is 256222727. The next prime is 256222873. The reversal of 256222746 is 647222652.

256222746 is a `hidden beast` number, since 2 + 5 + 622 + 27 + 4 + 6 = 666.

256222746 is digitally balanced in base 2, 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 2 ways, for example, as 255200625 + 1022121 = 15975^2 + 1011^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 256222746.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 547251 + ... + 547718.

Almost surely, 2^256222746 is an apocalyptic number.

256222746 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

256222746 is an abundant number, since it is smaller than the sum of its proper divisors (341630874).

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

256222746 is a wasteful number, since it uses less digits than its factorization.

256222746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1094990 (or 1094987 counting only the distinct ones).

The product of its digits is 80640, while the sum is 36.

The square root of 256222746 is about 16006.9592990049. The cubic root of 256222746 is about 635.1445274185.

The spelling of 256222746 in words is "two hundred fifty-six million, two hundred twenty-two thousand, seven hundred forty-six".