728366 has 4 divisors (see below), whose sum is σ = 1092552. Its totient is φ = 364182.

The previous prime is 728333. The next prime is 728369. The reversal of 728366 is 663827.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 728366.

It is not an unprimeable number, because it can be changed into a prime (728369) by changing a digit.

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 as a sum of consecutive naturals, namely, 182090 + ... + 182093.

It is an arithmetic number, because the mean of its divisors is an integer number (273138).

2⁷²⁸³⁶⁶ is an apocalyptic number.

728366 is a deficient number, since it is larger than the sum of its proper divisors (364186).

728366 is a wasteful number, since it uses less digits than its factorization.

728366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364185.

The product of its digits is 12096, while the sum is 32.

The square root of 728366 is about 853.4436126658. The cubic root of 728366 is about 89.9739018979.

The spelling of 728366 in words is "seven hundred twenty-eight thousand, three hundred sixty-six".