256328906 has 8 divisors (see below), whose sum is σ = 384562080. Its totient is φ = 128141548.

The previous prime is 256328903. The next prime is 256328909. The reversal of 256328906 is 609823652.

256328906 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (256328903) and next prime (256328909).

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

It is not an unprimeable number, because it can be changed into a prime (256328903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12845 + ... + 26031.

It is an arithmetic number, because the mean of its divisors is an integer number (48070260).

Almost surely, 2^256328906 is an apocalyptic number.

256328906 is a deficient number, since it is larger than the sum of its proper divisors (128233174).

256328906 is a wasteful number, since it uses less digits than its factorization.

256328906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22908.

The product of its (nonzero) digits is 155520, while the sum is 41.

The square root of 256328906 is about 16010.2750132532. The cubic root of 256328906 is about 635.2322344807.

The spelling of 256328906 in words is "two hundred fifty-six million, three hundred twenty-eight thousand, nine hundred six".