256404462 has 8 divisors (see below), whose sum is σ = 512808936. Its totient is φ = 85468152.

The previous prime is 256404451. The next prime is 256404469. The reversal of 256404462 is 264404652.

It is a sphenic number, since it is the product of 3 distinct primes.

256404462 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256404469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21367033 + ... + 21367044.

It is an arithmetic number, because the mean of its divisors is an integer number (64101117).

Almost surely, 2^256404462 is an apocalyptic number.

256404462 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

256404462 is a wasteful number, since it uses less digits than its factorization.

256404462 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42734082.

The product of its (nonzero) digits is 46080, while the sum is 33.

The square root of 256404462 is about 16012.6344490843. The cubic root of 256404462 is about 635.2946424399.

The spelling of 256404462 in words is "two hundred fifty-six million, four hundred four thousand, four hundred sixty-two".