256206330 has 24 divisors (see below), whose sum is σ = 666136692. Its totient is φ = 68321664.

The previous prime is 256206323. The next prime is 256206359. The reversal of 256206330 is 33602652.

256206330 is a `hidden beast` number, since 2 + 5 + 6 + 20 + 633 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 250050969 + 6155361 = 15813^2 + 2481^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 256206294 and 256206303.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1423279 + ... + 1423458.

Almost surely, 2^256206330 is an apocalyptic number.

256206330 is an abundant number, since it is smaller than the sum of its proper divisors (409930362).

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

256206330 is a wasteful number, since it uses less digits than its factorization.

256206330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2846750 (or 2846747 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

The square root of 256206330 is about 16006.4465138269. The cubic root of 256206330 is about 635.1309627170.

Adding to 256206330 its reverse (33602652), we get a palindrome (289808982).

The spelling of 256206330 in words is "two hundred fifty-six million, two hundred six thousand, three hundred thirty".