256835306 has 16 divisors (see below), whose sum is σ = 474157824. Its totient is φ = 101605104.

The previous prime is 256835251. The next prime is 256835309. The reversal of 256835306 is 603538652.

It is a happy number.

It is a super-2 number, since 2×256835306² = 131928748816227272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 256835306.

It is not an unprimeable number, because it can be changed into a prime (256835309) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 705410 + ... + 705773.

It is an arithmetic number, because the mean of its divisors is an integer number (29634864).

Almost surely, 2^256835306 is an apocalyptic number.

256835306 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

256835306 is a deficient number, since it is larger than the sum of its proper divisors (217322518).

256835306 is a wasteful number, since it uses less digits than its factorization.

256835306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1411205.

The product of its (nonzero) digits is 129600, while the sum is 38.

The square root of 256835306 is about 16026.0820539519. The cubic root of 256835306 is about 635.6502781108.

The spelling of 256835306 in words is "two hundred fifty-six million, eight hundred thirty-five thousand, three hundred six".