728943980 has 24 divisors (see below), whose sum is σ = 1559667312. Its totient is φ = 286075712.

The previous prime is 728943973. The next prime is 728944019. The reversal of 728943980 is 89349827.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 342782 + ... + 344901.

It is an arithmetic number, because the mean of its divisors is an integer number (64986138).

Almost surely, 2^728943980 is an apocalyptic number.

It is an amenable number.

728943980 is an abundant number, since it is smaller than the sum of its proper divisors (830723332).

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

728943980 is a wasteful number, since it uses less digits than its factorization.

728943980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687745 (or 687743 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 50.

The square root of 728943980 is about 26998.9625726619. The cubic root of 728943980 is about 899.9769459115.

The spelling of 728943980 in words is "seven hundred twenty-eight million, nine hundred forty-three thousand, nine hundred eighty".