255558820 has 48 divisors (see below), whose sum is σ = 593744256. Its totient is φ = 91616000.

The previous prime is 255558799. The next prime is 255558833. The reversal of 255558820 is 28855552.

It is a happy number.

255558820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7440 + ... + 23800.

It is an arithmetic number, because the mean of its divisors is an integer number (12369672).

Almost surely, 2^255558820 is an apocalyptic number.

255558820 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 255558820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (296872128).

255558820 is an abundant number, since it is smaller than the sum of its proper divisors (338185436).

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

255558820 is a wasteful number, since it uses less digits than its factorization.

255558820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16452 (or 16450 counting only the distinct ones).

The product of its (nonzero) digits is 160000, while the sum is 40.

The square root of 255558820 is about 15986.2071799411. The cubic root of 255558820 is about 634.5954560538.

The spelling of 255558820 in words is "two hundred fifty-five million, five hundred fifty-eight thousand, eight hundred twenty".