728278 has 8 divisors (see below), whose sum is σ = 1096200. Its totient is φ = 362880.

The previous prime is 728269. The next prime is 728281. The reversal of 728278 is 872827.

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

It is a congruent number.

It is an unprimeable number.

728278 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, 493 + ... + 1303.

It is an arithmetic number, because the mean of its divisors is an integer number (137025).

2⁷²⁸²⁷⁸ is an apocalyptic number.

728278 is a deficient number, since it is larger than the sum of its proper divisors (367922).

728278 is a wasteful number, since it uses less digits than its factorization.

728278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1262.

The product of its digits is 12544, while the sum is 34.

The square root of 728278 is about 853.3920552712. The cubic root of 728278 is about 89.9702782516.

The spelling of 728278 in words is "seven hundred twenty-eight thousand, two hundred seventy-eight".