255447856 has 20 divisors (see below), whose sum is σ = 520979800. Its totient is φ = 121001472.

The previous prime is 255447853. The next prime is 255447859. The reversal of 255447856 is 658744552.

It is an interprime number because it is at equal distance from previous prime (255447853) and next prime (255447859).

It is not an unprimeable number, because it can be changed into a prime (255447853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 419841 + ... + 420448.

It is an arithmetic number, because the mean of its divisors is an integer number (26048990).

Almost surely, 2^255447856 is an apocalyptic number.

It is an amenable number.

255447856 is an abundant number, since it is smaller than the sum of its proper divisors (265531944).

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

255447856 is a wasteful number, since it uses less digits than its factorization.

255447856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 840316 (or 840310 counting only the distinct ones).

The product of its digits is 1344000, while the sum is 46.

The square root of 255447856 is about 15982.7361862730. The cubic root of 255447856 is about 634.5035953432.

The spelling of 255447856 in words is "two hundred fifty-five million, four hundred forty-seven thousand, eight hundred fifty-six".