728818 has 8 divisors (see below), whose sum is σ = 1097712. Its totient is φ = 362916.

The previous prime is 728813. The next prime is 728831. The reversal of 728818 is 818827.

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

It is not an unprimeable number, because it can be changed into a prime (728813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21 + ... + 1207.

It is an arithmetic number, because the mean of its divisors is an integer number (137214).

2⁷²⁸⁸¹⁸ is an apocalyptic number.

728818 is a deficient number, since it is larger than the sum of its proper divisors (368894).

728818 is a wasteful number, since it uses less digits than its factorization.

728818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1496.

The product of its digits is 7168, while the sum is 34.

The square root of 728818 is about 853.7083811232. The cubic root of 728818 is about 89.9925096647.

Subtracting 728818 from its reverse (818827), we obtain a palindrome (90009).

The spelling of 728818 in words is "seven hundred twenty-eight thousand, eight hundred eighteen".