728079969 has 8 divisors (see below), whose sum is σ = 997010560. Its totient is φ = 472268016.

The previous prime is 728079953. The next prime is 728079971. The reversal of 728079969 is 969970827.

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

It is not a de Polignac number, because 728079969 - 2⁴ = 728079953 is a prime.

It is a super-2 number, since 2×728079969² = 1060200882518081922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (728079929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3279529 + ... + 3279750.

It is an arithmetic number, because the mean of its divisors is an integer number (124626320).

Almost surely, 2^728079969 is an apocalyptic number.

It is an amenable number.

728079969 is a deficient number, since it is larger than the sum of its proper divisors (268930591).

728079969 is a wasteful number, since it uses less digits than its factorization.

728079969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6559319.

The product of its (nonzero) digits is 3429216, while the sum is 57.

The square root of 728079969 is about 26982.9570099350. The cubic root of 728079969 is about 899.6212270322.

The spelling of 728079969 in words is "seven hundred twenty-eight million, seventy-nine thousand, nine hundred sixty-nine".