728915 has 16 divisors (see below), whose sum is σ = 989280. Its totient is φ = 510720.

The previous prime is 728911. The next prime is 728921. The reversal of 728915 is 519827.

It is not a de Polignac number, because 728915 - 2² = 728911 is a prime.

It is not an unprimeable number, because it can be changed into a prime (728911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1367 + ... + 1823.

It is an arithmetic number, because the mean of its divisors is an integer number (61830).

2⁷²⁸⁹¹⁵ is an apocalyptic number.

728915 is a deficient number, since it is larger than the sum of its proper divisors (260365).

728915 is a wasteful number, since it uses less digits than its factorization.

728915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502.

The product of its digits is 5040, while the sum is 32.

The square root of 728915 is about 853.7651902016. The cubic root of 728915 is about 89.9965019217.

The spelling of 728915 in words is "seven hundred twenty-eight thousand, nine hundred fifteen".