255535728 has 80 divisors (see below), whose sum is σ = 778807296. Its totient is φ = 70652160.

The previous prime is 255535717. The next prime is 255535751. The reversal of 255535728 is 827535552.

It is a happy number.

255535728 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 255535728.

It is a congruent number.

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, 1851 + ... + 22682.

Almost surely, 2^255535728 is an apocalyptic number.

255535728 is a gapful number since it is divisible by the number (28) 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 255535728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (389403648).

255535728 is an abundant number, since it is smaller than the sum of its proper divisors (523271568).

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

255535728 is a wasteful number, since it uses less digits than its factorization.

255535728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24582 (or 24576 counting only the distinct ones).

The product of its digits is 420000, while the sum is 42.

The square root of 255535728 is about 15985.4849160105. The cubic root of 255535728 is about 634.5763417071.

It can be divided in two parts, 2555 and 35728, that added together give a palindrome (38283).

The spelling of 255535728 in words is "two hundred fifty-five million, five hundred thirty-five thousand, seven hundred twenty-eight".