256456630 has 8 divisors (see below), whose sum is σ = 461621952. Its totient is φ = 102582648.

The previous prime is 256456621. The next prime is 256456633. The reversal of 256456630 is 36654652.

256456630 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a self number, because there is not a number n which added to its sum of digits gives 256456630.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256456633) 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, 12822822 + ... + 12822841.

It is an arithmetic number, because the mean of its divisors is an integer number (57702744).

Almost surely, 2^256456630 is an apocalyptic number.

256456630 is a deficient number, since it is larger than the sum of its proper divisors (205165322).

256456630 is a wasteful number, since it uses less digits than its factorization.

256456630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25645670.

The product of its (nonzero) digits is 129600, while the sum is 37.

The square root of 256456630 is about 16014.2633299194. The cubic root of 256456630 is about 635.3377251580.

The spelling of 256456630 in words is "two hundred fifty-six million, four hundred fifty-six thousand, six hundred thirty".