728518 has 16 divisors (see below), whose sum is σ = 1322784. Its totient is φ = 293760.

The previous prime is 728489. The next prime is 728521. The reversal of 728518 is 815827.

It is a self number, because there is not a number n which added to its sum of digits gives 728518.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1293 + ... + 1768.

It is an arithmetic number, because the mean of its divisors is an integer number (82674).

2⁷²⁸⁵¹⁸ is an apocalyptic number.

728518 is a deficient number, since it is larger than the sum of its proper divisors (594266).

728518 is a wasteful number, since it uses less digits than its factorization.

728518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3087.

The product of its digits is 4480, while the sum is 31.

The square root of 728518 is about 853.5326590119. The cubic root of 728518 is about 89.9801602359.

The spelling of 728518 in words is "seven hundred twenty-eight thousand, five hundred eighteen".