255881430 has 192 divisors, whose sum is σ = 807206400. Its totient is φ = 58296672.

The previous prime is 255881389. The next prime is 255881459. The reversal of 255881430 is 34188552.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 833337 + ... + 833643.

It is an arithmetic number, because the mean of its divisors is an integer number (4204200).

Almost surely, 2^255881430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 255881430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (403603200).

255881430 is an abundant number, since it is smaller than the sum of its proper divisors (551324970).

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

255881430 is an equidigital number, since it uses as much as digits as its factorization.

255881430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350 (or 324 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The square root of 255881430 is about 15996.2942583587. The cubic root of 255881430 is about 634.8623753660.

The spelling of 255881430 in words is "two hundred fifty-five million, eight hundred eighty-one thousand, four hundred thirty".