728813587 has 8 divisors (see below), whose sum is σ = 758575440. Its totient is φ = 699360480.

The previous prime is 728813573. The next prime is 728813597. The reversal of 728813587 is 785318827.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 728813587 - 2²³ = 720424979 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 728813587.

It is not an unprimeable number, because it can be changed into a prime (728813597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72364 + ... + 81817.

It is an arithmetic number, because the mean of its divisors is an integer number (94821930).

Almost surely, 2^728813587 is an apocalyptic number.

728813587 is a deficient number, since it is larger than the sum of its proper divisors (29761853).

728813587 is a wasteful number, since it uses less digits than its factorization.

728813587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154373.

The product of its digits is 752640, while the sum is 49.

The square root of 728813587 is about 26996.5476866951. The cubic root of 728813587 is about 899.9232802916.

The spelling of 728813587 in words is "seven hundred twenty-eight million, eight hundred thirteen thousand, five hundred eighty-seven".