728961789 has 16 divisors (see below), whose sum is σ = 987681600. Its totient is φ = 478170240.

The previous prime is 728961763. The next prime is 728961791. The reversal of 728961789 is 987169827.

It is not a de Polignac number, because 728961789 - 2¹² = 728957693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728961749) 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, 40209 + ... + 55449.

It is an arithmetic number, because the mean of its divisors is an integer number (61730100).

Almost surely, 2^728961789 is an apocalyptic number.

It is an amenable number.

728961789 is a deficient number, since it is larger than the sum of its proper divisors (258719811).

728961789 is a wasteful number, since it uses less digits than its factorization.

728961789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15500.

The product of its digits is 3048192, while the sum is 57.

The square root of 728961789 is about 26999.2923796162. The cubic root of 728961789 is about 899.9842750339.

The spelling of 728961789 in words is "seven hundred twenty-eight million, nine hundred sixty-one thousand, seven hundred eighty-nine".