256441790 has 32 divisors (see below), whose sum is σ = 506926080. Its totient is φ = 92628000.

The previous prime is 256441781. The next prime is 256441799. The reversal of 256441790 is 97144652.

It is an interprime number because it is at equal distance from previous prime (256441781) and next prime (256441799).

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256441799) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 8891 + ... + 24329.

It is an arithmetic number, because the mean of its divisors is an integer number (15841440).

Almost surely, 2^256441790 is an apocalyptic number.

256441790 is a deficient number, since it is larger than the sum of its proper divisors (250484290).

256441790 is a wasteful number, since it uses less digits than its factorization.

256441790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15608.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 256441790 is about 16013.7999862618. The cubic root of 256441790 is about 635.3254702025.

The spelling of 256441790 in words is "two hundred fifty-six million, four hundred forty-one thousand, seven hundred ninety".