728378 has 8 divisors (see below), whose sum is σ = 1248672. Its totient is φ = 312156.

The previous prime is 728369. The next prime is 728381. The reversal of 728378 is 873827.

It is a happy number.

728378 is nontrivially palindromic in base 13.

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

It is an unprimeable 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, 26000 + ... + 26027.

It is an arithmetic number, because the mean of its divisors is an integer number (156084).

2⁷²⁸³⁷⁸ is an apocalyptic number.

728378 is a deficient number, since it is larger than the sum of its proper divisors (520294).

728378 is a wasteful number, since it uses less digits than its factorization.

728378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52036.

The product of its digits is 18816, while the sum is 35.

The square root of 728378 is about 853.4506429783. The cubic root of 728378 is about 89.9743960088.

The spelling of 728378 in words is "seven hundred twenty-eight thousand, three hundred seventy-eight".