728383462578 has 54 divisors (see below), whose sum is σ = 1676599819479. Its totient is φ = 228493147392.

The previous prime is 728383462553. The next prime is 728383462589. The reversal of 728383462578 is 875264383827.

728383462578 is a `hidden beast` number, since 7 + 2 + 8 + 38 + 346 + 257 + 8 = 666.

It can be written as a sum of positive squares in 5 ways, for example, as 726113607129 + 2269855449 = 852123^2 + 47643^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=603483.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 61549350 + ... + 61561182.

Almost surely, 2^728383462578 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 728383462578

728383462578 is an abundant number, since it is smaller than the sum of its proper divisors (948216356901).

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

728383462578 is an equidigital number, since it uses as much as digits as its factorization.

728383462578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23708 (or 11855 counting only the distinct ones).

The product of its digits is 108380160, while the sum is 63.

The spelling of 728383462578 in words is "seven hundred twenty-eight billion, three hundred eighty-three million, four hundred sixty-two thousand, five hundred seventy-eight".