255430728 has 96 divisors (see below), whose sum is σ = 806832000. Its totient is φ = 72973152.

The previous prime is 255430711. The next prime is 255430739. The reversal of 255430728 is 827034552.

255430728 is a `hidden beast` number, since 2 + 554 + 30 + 72 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 255430692 and 255430701.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19525 + ... + 29867.

It is an arithmetic number, because the mean of its divisors is an integer number (8404500).

Almost surely, 2^255430728 is an apocalyptic number.

255430728 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 255430728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (403416000).

255430728 is an abundant number, since it is smaller than the sum of its proper divisors (551401272).

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

255430728 is a wasteful number, since it uses less digits than its factorization.

255430728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10376 (or 10355 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 36.

The square root of 255430728 is about 15982.2003491384. The cubic root of 255430728 is about 634.4894136877.

The spelling of 255430728 in words is "two hundred fifty-five million, four hundred thirty thousand, seven hundred twenty-eight".