256446356 has 6 divisors (see below), whose sum is σ = 448781130. Its totient is φ = 128223176.

The previous prime is 256446331. The next prime is 256446361. The reversal of 256446356 is 653644652.

It is a happy number.

256446356 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 only one way, i.e., 197402500 + 59043856 = 14050^2 + 7684^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32055791 + ... + 32055798.

It is an arithmetic number, because the mean of its divisors is an integer number (74796855).

Almost surely, 2^256446356 is an apocalyptic number.

It is an amenable number.

256446356 is a deficient number, since it is larger than the sum of its proper divisors (192334774).

256446356 is a wasteful number, since it uses less digits than its factorization.

256446356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64111593 (or 64111591 counting only the distinct ones).

The product of its digits is 518400, while the sum is 41.

The square root of 256446356 is about 16013.9425501655. The cubic root of 256446356 is about 635.3292408814.

The spelling of 256446356 in words is "two hundred fifty-six million, four hundred forty-six thousand, three hundred fifty-six".