256826835 has 16 divisors (see below), whose sum is σ = 456581280. Its totient is φ = 136974240.

The previous prime is 256826833. The next prime is 256826839. The reversal of 256826835 is 538628652.

256826835 is a `hidden beast` number, since 2 + 568 + 2 + 6 + 83 + 5 = 666.

It is not a de Polignac number, because 256826835 - 2¹ = 256826833 is a prime.

It is a super-2 number, since 2×256826835² = 131920046352234450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (256826833) 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, 951076 + ... + 951345.

It is an arithmetic number, because the mean of its divisors is an integer number (28536330).

Almost surely, 2^256826835 is an apocalyptic number.

256826835 is a deficient number, since it is larger than the sum of its proper divisors (199754445).

256826835 is a wasteful number, since it uses less digits than its factorization.

256826835 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1902435 (or 1902429 counting only the distinct ones).

The product of its digits is 691200, while the sum is 45.

The square root of 256826835 is about 16025.8177638459. The cubic root of 256826835 is about 635.6432896470.

It can be divided in two parts, 2568 and 26835, that added together give a triangular number (29403 = T₂₄₂).

The spelling of 256826835 in words is "two hundred fifty-six million, eight hundred twenty-six thousand, eight hundred thirty-five".