256353794 has 16 divisors (see below), whose sum is σ = 399868920. Its totient is φ = 123110400.

The previous prime is 256353793. The next prime is 256353809. The reversal of 256353794 is 497353652.

It can be written as a sum of positive squares in 4 ways, for example, as 247275625 + 9078169 = 15725^2 + 3013^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (256353793) 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 7 ways as a sum of consecutive naturals, for example, 257 + ... + 22644.

Almost surely, 2^256353794 is an apocalyptic number.

256353794 is a deficient number, since it is larger than the sum of its proper divisors (143515126).

256353794 is a wasteful number, since it uses less digits than its factorization.

256353794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23125.

The product of its digits is 680400, while the sum is 44.

The square root of 256353794 is about 16011.0522452461. The cubic root of 256353794 is about 635.2527928958.

The spelling of 256353794 in words is "two hundred fifty-six million, three hundred fifty-three thousand, seven hundred ninety-four".