728392 has 16 divisors (see below), whose sum is σ = 1560960. Its totient is φ = 312144.

The previous prime is 728383. The next prime is 728417. The reversal of 728392 is 293827.

It is an unprimeable number.

728392 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, 6448 + ... + 6559.

It is an arithmetic number, because the mean of its divisors is an integer number (97560).

2⁷²⁸³⁹² is an apocalyptic number.

It is an amenable number.

728392 is an abundant number, since it is smaller than the sum of its proper divisors (832568).

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

728392 is a wasteful number, since it uses less digits than its factorization.

728392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13020 (or 13016 counting only the distinct ones).

The product of its digits is 6048, while the sum is 31.

The square root of 728392 is about 853.4588449363. The cubic root of 728392 is about 89.9749724648.

It can be divided in two parts, 72 and 8392, that added together give a square (8464 = 92²).

The spelling of 728392 in words is "seven hundred twenty-eight thousand, three hundred ninety-two".