256228744 has 32 divisors (see below), whose sum is σ = 495000000. Its totient is φ = 124270272.

The previous prime is 256228741. The next prime is 256228781. The reversal of 256228744 is 447822652.

It is a junction number, because it is equal to n+sod(n) for n = 256228697 and 256228706.

It is not an unprimeable number, because it can be changed into a prime (256228741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48757 + ... + 53755.

It is an arithmetic number, because the mean of its divisors is an integer number (15468750).

Almost surely, 2^256228744 is an apocalyptic number.

It is an amenable number.

256228744 is a deficient number, since it is larger than the sum of its proper divisors (238771256).

256228744 is a wasteful number, since it uses less digits than its factorization.

256228744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5197 (or 5193 counting only the distinct ones).

The product of its digits is 215040, while the sum is 40.

The square root of 256228744 is about 16007.1466539168. The cubic root of 256228744 is about 635.1494834801.

The spelling of 256228744 in words is "two hundred fifty-six million, two hundred twenty-eight thousand, seven hundred forty-four".