728715 has 32 divisors (see below), whose sum is σ = 1302336. Its totient is φ = 345600.

The previous prime is 728713. The next prime is 728723. The reversal of 728715 is 517827.

It is a happy number.

It is not a de Polignac number, because 728715 - 2¹ = 728713 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 728715.

It is not an unprimeable number, because it can be changed into a prime (728713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7165 + ... + 7265.

It is an arithmetic number, because the mean of its divisors is an integer number (40698).

2⁷²⁸⁷¹⁵ is an apocalyptic number.

728715 is a deficient number, since it is larger than the sum of its proper divisors (573621).

728715 is a wasteful number, since it uses less digits than its factorization.

728715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159.

The product of its digits is 3920, while the sum is 30.

The square root of 728715 is about 853.6480539426. The cubic root of 728715 is about 89.9882700762.

The spelling of 728715 in words is "seven hundred twenty-eight thousand, seven hundred fifteen".