728247 has 16 divisors (see below), whose sum is σ = 1064448. Its totient is φ = 440160.

The previous prime is 728209. The next prime is 728261. The reversal of 728247 is 742827.

It is a de Polignac number, because none of the positive numbers 2^k-728247 is a prime.

728247 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728207) 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, 2638 + ... + 2900.

It is an arithmetic number, because the mean of its divisors is an integer number (66528).

2⁷²⁸²⁴⁷ is an apocalyptic number.

728247 is a deficient number, since it is larger than the sum of its proper divisors (336201).

728247 is a wasteful number, since it uses less digits than its factorization.

728247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350.

The product of its digits is 6272, while the sum is 30.

The square root of 728247 is about 853.3738922653. The cubic root of 728247 is about 89.9690016703.

The spelling of 728247 in words is "seven hundred twenty-eight thousand, two hundred forty-seven".