255874440 has 128 divisors (see below), whose sum is σ = 794344320. Its totient is φ = 65894400.

The previous prime is 255874391. The next prime is 255874441. The reversal of 255874440 is 44478552.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (255874441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 644322 + ... + 644718.

It is an arithmetic number, because the mean of its divisors is an integer number (6205815).

Almost surely, 2^255874440 is an apocalyptic number.

255874440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 255874440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (397172160).

255874440 is an abundant number, since it is smaller than the sum of its proper divisors (538469880).

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

255874440 is a wasteful number, since it uses less digits than its factorization.

255874440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583 (or 579 counting only the distinct ones).

The product of its (nonzero) digits is 179200, while the sum is 39.

The square root of 255874440 is about 15996.0757687628. The cubic root of 255874440 is about 634.8565943963.

The spelling of 255874440 in words is "two hundred fifty-five million, eight hundred seventy-four thousand, four hundred forty".