728844890 has 8 divisors (see below), whose sum is σ = 1311920820. Its totient is φ = 291537952.

The previous prime is 728844881. The next prime is 728844913. The reversal of 728844890 is 98448827.

728844890 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 2 ways, for example, as 606587641 + 122257249 = 24629^2 + 11057^2 .

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

It is a super-2 number, since 2×728844890² = 1062429747358224200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36442235 + ... + 36442254.

Almost surely, 2^728844890 is an apocalyptic number.

728844890 is a deficient number, since it is larger than the sum of its proper divisors (583075930).

728844890 is a wasteful number, since it uses less digits than its factorization.

728844890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72884496.

The product of its (nonzero) digits is 1032192, while the sum is 50.

The square root of 728844890 is about 26997.1274397851. The cubic root of 728844890 is about 899.9361641966.

The spelling of 728844890 in words is "seven hundred twenty-eight million, eight hundred forty-four thousand, eight hundred ninety".