728086 has 8 divisors (see below), whose sum is σ = 1121760. Its totient is φ = 354168.

The previous prime is 728069. The next prime is 728087. The reversal of 728086 is 680827.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728087) by changing a digit.

728086 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, 4846 + ... + 4993.

It is an arithmetic number, because the mean of its divisors is an integer number (140220).

2⁷²⁸⁰⁸⁶ is an apocalyptic number.

728086 is a deficient number, since it is larger than the sum of its proper divisors (393674).

728086 is a wasteful number, since it uses less digits than its factorization.

728086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9878.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 728086 is about 853.2795555971. The cubic root of 728086 is about 89.9623711009.

The spelling of 728086 in words is "seven hundred twenty-eight thousand, eighty-six".