728919943326 has 20 divisors (see below), whose sum is σ = 1633320614112. Its totient is φ = 242973314388.

The previous prime is 728919943307. The next prime is 728919943331. The reversal of 728919943326 is 623349919827.

728919943326 is a `hidden beast` number, since 7 + 2 + 8 + 9 + 199 + 433 + 2 + 6 = 666.

728919943326 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2249752750 + ... + 2249753073.

Almost surely, 2^728919943326 is an apocalyptic number.

728919943326 is an abundant number, since it is smaller than the sum of its proper divisors (904400670786).

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

728919943326 is a wasteful number, since it uses less digits than its factorization.

728919943326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4499505837 (or 4499505828 counting only the distinct ones).

The product of its digits is 35271936, while the sum is 63.

The spelling of 728919943326 in words is "seven hundred twenty-eight billion, nine hundred nineteen million, nine hundred forty-three thousand, three hundred twenty-six".