728831826 has 48 divisors (see below), whose sum is σ = 1621941048. Its totient is φ = 236390400.

The previous prime is 728831821. The next prime is 728831833. The reversal of 728831826 is 628138827.

728831826 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 615089601 + 113742225 = 24801^2 + 10665^2 .

It is not an unprimeable number, because it can be changed into a prime (728831821) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 336186 + ... + 338346.

Almost surely, 2^728831826 is an apocalyptic number.

728831826 is an abundant number, since it is smaller than the sum of its proper divisors (893109222).

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

728831826 is a wasteful number, since it uses less digits than its factorization.

728831826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2667 (or 2664 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 728831826 is about 26996.8854870335. The cubic root of 728831826 is about 899.9307872701.

The spelling of 728831826 in words is "seven hundred twenty-eight million, eight hundred thirty-one thousand, eight hundred twenty-six".