728486 has 8 divisors (see below), whose sum is σ = 1192104. Its totient is φ = 331120.

The previous prime is 728477. The next prime is 728489. The reversal of 728486 is 684827.

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

It is a congruent number.

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

728486 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16535 + ... + 16578.

It is an arithmetic number, because the mean of its divisors is an integer number (149013).

2⁷²⁸⁴⁸⁶ is an apocalyptic number.

728486 is a deficient number, since it is larger than the sum of its proper divisors (463618).

728486 is a wasteful number, since it uses less digits than its factorization.

728486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33126.

The product of its digits is 21504, while the sum is 35.

The square root of 728486 is about 853.5139131848. The cubic root of 728486 is about 89.9788427634.

It can be divided in two parts, 72 and 8486, that added together give a palindrome (8558).

The spelling of 728486 in words is "seven hundred twenty-eight thousand, four hundred eighty-six".