728488 has 16 divisors (see below), whose sum is σ = 1399860. Its totient is φ = 355200.

The previous prime is 728477. The next prime is 728489. The reversal of 728488 is 884827.

728488 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 702244 + 26244 = 838^2 + 162^2 .

It is a super-2 number, since 2×728488² = 1061389532288, which contains 22 as substring.

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

728488 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 783 + ... + 1438.

2⁷²⁸⁴⁸⁸ is an apocalyptic number.

It is an amenable number.

728488 is a deficient number, since it is larger than the sum of its proper divisors (671372).

728488 is a wasteful number, since it uses less digits than its factorization.

728488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2268 (or 2264 counting only the distinct ones).

The product of its digits is 28672, while the sum is 37.

The square root of 728488 is about 853.5150848110. The cubic root of 728488 is about 89.9789251065.

The spelling of 728488 in words is "seven hundred twenty-eight thousand, four hundred eighty-eight".