728612 has 12 divisors (see below), whose sum is σ = 1342320. Its totient is φ = 345096.

The previous prime is 728579. The next prime is 728627. The reversal of 728612 is 216827.

It is an unprimeable number.

728612 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, 4718 + ... + 4869.

It is an arithmetic number, because the mean of its divisors is an integer number (111860).

2⁷²⁸⁶¹² is an apocalyptic number.

It is an amenable number.

728612 is a deficient number, since it is larger than the sum of its proper divisors (613708).

728612 is a wasteful number, since it uses less digits than its factorization.

728612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9610 (or 9608 counting only the distinct ones).

The product of its digits is 1344, while the sum is 26.

The square root of 728612 is about 853.5877224984. The cubic root of 728612 is about 89.9840300882.

The spelling of 728612 in words is "seven hundred twenty-eight thousand, six hundred twelve".