255440320 has 28 divisors (see below), whose sum is σ = 608268024. Its totient is φ = 102176000.

The previous prime is 255440303. The next prime is 255440327. The reversal of 255440320 is 23044552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255440327) 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, 398806 + ... + 399445.

It is an arithmetic number, because the mean of its divisors is an integer number (21723858).

Almost surely, 2^255440320 is an apocalyptic number.

255440320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255440320 is an abundant number, since it is smaller than the sum of its proper divisors (352827704).

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

255440320 is an equidigital number, since it uses as much as digits as its factorization.

255440320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798268 (or 798258 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 255440320 is about 15982.5004301580. The cubic root of 255440320 is about 634.4973557579.

Adding to 255440320 its reverse (23044552), we get a palindrome (278484872).

The spelling of 255440320 in words is "two hundred fifty-five million, four hundred forty thousand, three hundred twenty".