256355830 has 8 divisors (see below), whose sum is σ = 461440512. Its totient is φ = 102542328.

The previous prime is 256355791. The next prime is 256355849. The reversal of 256355830 is 38553652.

256355830 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 256355830.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12817782 + ... + 12817801.

It is an arithmetic number, because the mean of its divisors is an integer number (57680064).

Almost surely, 2^256355830 is an apocalyptic number.

256355830 is a deficient number, since it is larger than the sum of its proper divisors (205084682).

256355830 is a wasteful number, since it uses less digits than its factorization.

256355830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25635590.

The product of its (nonzero) digits is 108000, while the sum is 37.

The square root of 256355830 is about 16011.1158262002. The cubic root of 256355830 is about 635.2544746488.

The spelling of 256355830 in words is "two hundred fifty-six million, three hundred fifty-five thousand, eight hundred thirty".