256434304 has 32 divisors (see below), whose sum is σ = 583848000. Its totient is φ = 109900032.

The previous prime is 256434293. The next prime is 256434313. The reversal of 256434304 is 403434652.

It is a tau number, because it is divible by the number of its divisors (32).

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, 142204 + ... + 143995.

It is an arithmetic number, because the mean of its divisors is an integer number (18245250).

Almost surely, 2^256434304 is an apocalyptic number.

It is an amenable number.

256434304 is an abundant number, since it is smaller than the sum of its proper divisors (327413696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256434304 is an equidigital number, since it uses as much as digits as its factorization.

256434304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286220 (or 286208 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 31.

The square root of 256434304 is about 16013.5662486530. The cubic root of 256434304 is about 635.3192880422.

Adding to 256434304 its reverse (403434652), we get a palindrome (659868956).

The spelling of 256434304 in words is "two hundred fifty-six million, four hundred thirty-four thousand, three hundred four".