256704442 has 8 divisors (see below), whose sum is σ = 385437600. Its totient is φ = 128225244.

The previous prime is 256704439. The next prime is 256704451. The reversal of 256704442 is 244407652.

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

It is a junction number, because it is equal to n+sod(n) for n = 256704398 and 256704407.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60942 + ... + 65017.

It is an arithmetic number, because the mean of its divisors is an integer number (48179700).

Almost surely, 2^256704442 is an apocalyptic number.

256704442 is a deficient number, since it is larger than the sum of its proper divisors (128733158).

256704442 is a wasteful number, since it uses less digits than its factorization.

256704442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126980.

The product of its (nonzero) digits is 53760, while the sum is 34.

The square root of 256704442 is about 16021.9986893022. The cubic root of 256704442 is about 635.5422998745.

The spelling of 256704442 in words is "two hundred fifty-six million, seven hundred four thousand, four hundred forty-two".