728515715 has 8 divisors (see below), whose sum is σ = 876194928. Its totient is φ = 581495200.

The previous prime is 728515709. The next prime is 728515729. The reversal of 728515715 is 517515827.

728515715 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

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

It is a de Polignac number, because none of the positive numbers 2^k-728515715 is a prime.

It is a super-2 number, since 2×728515715² = 1061470294003922450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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, 162236 + ... + 166665.

It is an arithmetic number, because the mean of its divisors is an integer number (109524366).

Almost surely, 2^728515715 is an apocalyptic number.

728515715 is a deficient number, since it is larger than the sum of its proper divisors (147679213).

728515715 is a wasteful number, since it uses less digits than its factorization.

728515715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329349.

The product of its digits is 98000, while the sum is 41.

The square root of 728515715 is about 26991.0302693321. The cubic root of 728515715 is about 899.8006616137.

The spelling of 728515715 in words is "seven hundred twenty-eight million, five hundred fifteen thousand, seven hundred fifteen".