728499 has 8 divisors (see below), whose sum is σ = 978880. Its totient is φ = 481896.

The previous prime is 728489. The next prime is 728521. The reversal of 728499 is 994827.

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

It is not a de Polignac number, because 728499 - 2¹² = 724403 is a prime.

It is an Ulam number.

It is a Duffinian number.

728499 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (728489) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 457 + ... + 1290.

It is an arithmetic number, because the mean of its divisors is an integer number (122360).

2⁷²⁸⁴⁹⁹ is an apocalyptic number.

728499 is a deficient number, since it is larger than the sum of its proper divisors (250381).

728499 is a wasteful number, since it uses less digits than its factorization.

728499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1889.

The product of its digits is 36288, while the sum is 39.

The square root of 728499 is about 853.5215287267. The cubic root of 728499 is about 89.9793779912.

The spelling of 728499 in words is "seven hundred twenty-eight thousand, four hundred ninety-nine".