728019 has 12 divisors (see below), whose sum is σ = 1097616. Its totient is φ = 464112.

The previous prime is 728017. The next prime is 728027. The reversal of 728019 is 910827.

It is not a de Polignac number, because 728019 - 2¹ = 728017 is a prime.

It is a super-2 number, since 2×728019² = 1060023328722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

728019 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 727983 and 728001.

It is not an unprimeable number, because it can be changed into a prime (728017) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1552 + ... + 1965.

It is an arithmetic number, because the mean of its divisors is an integer number (91468).

2⁷²⁸⁰¹⁹ is an apocalyptic number.

728019 is a deficient number, since it is larger than the sum of its proper divisors (369597).

728019 is a wasteful number, since it uses less digits than its factorization.

728019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3546 (or 3543 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 728019 is about 853.2402944071. The cubic root of 728019 is about 89.9596115076.

The spelling of 728019 in words is "seven hundred twenty-eight thousand, nineteen".