256704398 has 8 divisors (see below), whose sum is σ = 391583160. Its totient is φ = 126176680.

The previous prime is 256704377. The next prime is 256704401. The reversal of 256704398 is 893407652.

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

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, 1087613 + ... + 1087848.

It is an arithmetic number, because the mean of its divisors is an integer number (48947895).

Almost surely, 2^256704398 is an apocalyptic number.

256704398 is a deficient number, since it is larger than the sum of its proper divisors (134878762).

256704398 is a wasteful number, since it uses less digits than its factorization.

256704398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2175522.

The product of its (nonzero) digits is 362880, while the sum is 44.

The square root of 256704398 is about 16021.9973161900. The cubic root of 256704398 is about 635.5422635631.

The spelling of 256704398 in words is "two hundred fifty-six million, seven hundred four thousand, three hundred ninety-eight".