728918582 has 48 divisors (see below), whose sum is σ = 1310031360. Its totient is φ = 297837120.

The previous prime is 728918569. The next prime is 728918587. The reversal of 728918582 is 285819827.

It is a happy number.

It is a super-4 number, since 4×728918582⁴ (a number of 37 digits) contains 4444 as substring.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 728918582.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728918587) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1105769 + ... + 1106427.

It is an arithmetic number, because the mean of its divisors is an integer number (27292320).

Almost surely, 2^728918582 is an apocalyptic number.

728918582 is a deficient number, since it is larger than the sum of its proper divisors (581112778).

728918582 is a wasteful number, since it uses less digits than its factorization.

728918582 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797 (or 756 counting only the distinct ones).

The product of its digits is 645120, while the sum is 50.

The square root of 728918582 is about 26998.4922171591. The cubic root of 728918582 is about 899.9664934028.

The spelling of 728918582 in words is "seven hundred twenty-eight million, nine hundred eighteen thousand, five hundred eighty-two".