728975769 has 16 divisors (see below), whose sum is σ = 984992832. Its totient is φ = 479510528.

The previous prime is 728975761. The next prime is 728975789. The reversal of 728975769 is 967579827.

It is not a de Polignac number, because 728975769 - 2³ = 728975761 is a prime.

It is a super-2 number, since 2×728975769² = 1062811343578282722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (728975761) 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, 72217 + ... + 81689.

It is an arithmetic number, because the mean of its divisors is an integer number (61562052).

Almost surely, 2^728975769 is an apocalyptic number.

It is an amenable number.

728975769 is a deficient number, since it is larger than the sum of its proper divisors (256017063).

728975769 is a wasteful number, since it uses less digits than its factorization.

728975769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9816.

The product of its digits is 13335840, while the sum is 60.

The square root of 728975769 is about 26999.5512740490. The cubic root of 728975769 is about 899.9900282846.

The spelling of 728975769 in words is "seven hundred twenty-eight million, nine hundred seventy-five thousand, seven hundred sixty-nine".