256463404 has 12 divisors (see below), whose sum is σ = 455510104. Its totient is φ = 126317664.

The previous prime is 256463399. The next prime is 256463407. The reversal of 256463404 is 404364652.

It is a self number, because there is not a number n which added to its sum of digits gives 256463404.

It is not an unprimeable number, because it can be changed into a prime (256463407) 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 3 ways as a sum of consecutive naturals, for example, 478209 + ... + 478744.

Almost surely, 2^256463404 is an apocalyptic number.

It is an amenable number.

256463404 is a deficient number, since it is larger than the sum of its proper divisors (199046700).

256463404 is a wasteful number, since it uses less digits than its factorization.

256463404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 957024 (or 957022 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 34.

The square root of 256463404 is about 16014.4748274803. The cubic root of 256463404 is about 635.3433190081.

The spelling of 256463404 in words is "two hundred fifty-six million, four hundred sixty-three thousand, four hundred four".