255441640 has 16 divisors (see below), whose sum is σ = 574743780. Its totient is φ = 102176640.

The previous prime is 255441631. The next prime is 255441647. The reversal of 255441640 is 46144552.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 248566756 + 6874884 = 15766^2 + 2622^2 .

It is not an unprimeable number, because it can be changed into a prime (255441647) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 3192981 + ... + 3193060.

Almost surely, 2^255441640 is an apocalyptic number.

255441640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255441640 is an abundant number, since it is smaller than the sum of its proper divisors (319302140).

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

255441640 is a wasteful number, since it uses less digits than its factorization.

255441640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6386052 (or 6386048 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 31.

The square root of 255441640 is about 15982.5417252701. The cubic root of 255441640 is about 634.4984486877.

The spelling of 255441640 in words is "two hundred fifty-five million, four hundred forty-one thousand, six hundred forty".