256604847 has 16 divisors (see below), whose sum is σ = 354780000. Its totient is φ = 164777984.

The previous prime is 256604809. The next prime is 256604891. The reversal of 256604847 is 748406652.

It is a cyclic number.

It is not a de Polignac number, because 256604847 - 2⁸ = 256604591 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 256604799 and 256604808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256624847) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 35779 + ... + 42347.

It is an arithmetic number, because the mean of its divisors is an integer number (22173750).

Almost surely, 2^256604847 is an apocalyptic number.

256604847 is a deficient number, since it is larger than the sum of its proper divisors (98175153).

256604847 is a wasteful number, since it uses less digits than its factorization.

256604847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7050.

The product of its (nonzero) digits is 322560, while the sum is 42.

The square root of 256604847 is about 16018.8903173722. The cubic root of 256604847 is about 635.4600976572.

The spelling of 256604847 in words is "two hundred fifty-six million, six hundred four thousand, eight hundred forty-seven".