728868826 has 32 divisors (see below), whose sum is σ = 1299110400. Its totient is φ = 306463248.

The previous prime is 728868821. The next prime is 728868839. The reversal of 728868826 is 628868827.

It is not an unprimeable number, because it can be changed into a prime (728868821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26335 + ... + 46381.

It is an arithmetic number, because the mean of its divisors is an integer number (40597200).

Almost surely, 2^728868826 is an apocalyptic number.

728868826 is a deficient number, since it is larger than the sum of its proper divisors (570241574).

728868826 is a wasteful number, since it uses less digits than its factorization.

728868826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20123 (or 20109 counting only the distinct ones).

The product of its digits is 4128768, while the sum is 55.

The square root of 728868826 is about 26997.5707425687. The cubic root of 728868826 is about 899.9460156920.

Subtracting from 728868826 its reverse (628868827), we obtain a palindrome (99999999).

The spelling of 728868826 in words is "seven hundred twenty-eight million, eight hundred sixty-eight thousand, eight hundred twenty-six".