728855323 has 4 divisors (see below), whose sum is σ = 832977520. Its totient is φ = 624733128.

The previous prime is 728855317. The next prime is 728855329. The reversal of 728855323 is 323558827.

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

It is an interprime number because it is at equal distance from previous prime (728855317) and next prime (728855329).

It is a cyclic number.

It is not a de Polignac number, because 728855323 - 2¹³ = 728847131 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 728855323.

It is not an unprimeable number, because it can be changed into a prime (728855329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52061088 + ... + 52061101.

It is an arithmetic number, because the mean of its divisors is an integer number (208244380).

Almost surely, 2^728855323 is an apocalyptic number.

728855323 is a deficient number, since it is larger than the sum of its proper divisors (104122197).

728855323 is a wasteful number, since it uses less digits than its factorization.

728855323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104122196.

The product of its digits is 403200, while the sum is 43.

The square root of 728855323 is about 26997.3206633547. The cubic root of 728855323 is about 899.9404582009.

The spelling of 728855323 in words is "seven hundred twenty-eight million, eight hundred fifty-five thousand, three hundred twenty-three".