256704445 has 8 divisors (see below), whose sum is σ = 308563200. Its totient is φ = 205018320.

The previous prime is 256704439. The next prime is 256704451. The reversal of 256704445 is 544407652.

It is an interprime number because it is at equal distance from previous prime (256704439) and next prime (256704451).

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

It is not a de Polignac number, because 256704445 - 2¹⁵ = 256671677 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39861 + ... + 45850.

It is an arithmetic number, because the mean of its divisors is an integer number (38570400).

Almost surely, 2^256704445 is an apocalyptic number.

It is an amenable number.

256704445 is a deficient number, since it is larger than the sum of its proper divisors (51858755).

256704445 is an equidigital number, since it uses as much as digits as its factorization.

256704445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86315.

The product of its (nonzero) digits is 134400, while the sum is 37.

The square root of 256704445 is about 16021.9987829234. The cubic root of 256704445 is about 635.5423023503.

The spelling of 256704445 in words is "two hundred fifty-six million, seven hundred four thousand, four hundred forty-five".