728004 has 48 divisors (see below), whose sum is σ = 1863680. Its totient is φ = 220320.

The previous prime is 728003. The next prime is 728017. The reversal of 728004 is 400827.

It is a happy number.

728004 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728003) 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, 7017 + ... + 7119.

2⁷²⁸⁰⁰⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 728004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (931840).

728004 is an abundant number, since it is smaller than the sum of its proper divisors (1135676).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

728004 is a wasteful number, since it uses less digits than its factorization.

728004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160 (or 158 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 728004 is about 853.2315043410. The cubic root of 728004 is about 89.9589936650.

The spelling of 728004 in words is "seven hundred twenty-eight thousand, four".