256136336 has 20 divisors (see below), whose sum is σ = 496750572. Its totient is φ = 127942656.

The previous prime is 256136327. The next prime is 256136347. The reversal of 256136336 is 633631652.

It can be written as a sum of positive squares in 2 ways, for example, as 44142736 + 211993600 = 6644^2 + 14560^2 .

It is a junction number, because it is equal to n+sod(n) for n = 256136296 and 256136305.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10256 + ... + 24848.

Almost surely, 2^256136336 is an apocalyptic number.

It is an amenable number.

256136336 is a deficient number, since it is larger than the sum of its proper divisors (240614236).

256136336 is a wasteful number, since it uses less digits than its factorization.

256136336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15698 (or 15692 counting only the distinct ones).

The product of its digits is 58320, while the sum is 35.

The square root of 256136336 is about 16004.2599329054. The cubic root of 256136336 is about 635.0731194863.

Adding to 256136336 its reverse (633631652), we get a palindrome (889767988).

The spelling of 256136336 in words is "two hundred fifty-six million, one hundred thirty-six thousand, three hundred thirty-six".