728814222 has 12 divisors (see below), whose sum is σ = 1579097520. Its totient is φ = 242938068.

The previous prime is 728814199. The next prime is 728814269. The reversal of 728814222 is 222418827.

728814222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20244822 + ... + 20244857.

It is an arithmetic number, because the mean of its divisors is an integer number (131591460).

Almost surely, 2^728814222 is an apocalyptic number.

728814222 is an abundant number, since it is smaller than the sum of its proper divisors (850283298).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

728814222 is a wasteful number, since it uses less digits than its factorization.

728814222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40489687 (or 40489684 counting only the distinct ones).

The product of its digits is 28672, while the sum is 36.

The square root of 728814222 is about 26996.5594474555. The cubic root of 728814222 is about 899.9235416529.

The spelling of 728814222 in words is "seven hundred twenty-eight million, eight hundred fourteen thousand, two hundred twenty-two".