728869231 has 8 divisors (see below), whose sum is σ = 738581760. Its totient is φ = 719179032.

The previous prime is 728869223. The next prime is 728869261. The reversal of 728869231 is 132968827.

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

It is a cyclic number.

It is not a de Polignac number, because 728869231 - 2³ = 728869223 is a prime.

It is a super-2 number, since 2×728869231² = 1062500711797062722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728869201) 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, 66186 + ... + 76408.

It is an arithmetic number, because the mean of its divisors is an integer number (92322720).

Almost surely, 2^728869231 is an apocalyptic number.

728869231 is a deficient number, since it is larger than the sum of its proper divisors (9712529).

728869231 is a wasteful number, since it uses less digits than its factorization.

728869231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11165.

The product of its digits is 290304, while the sum is 46.

The square root of 728869231 is about 26997.5782432425. The cubic root of 728869231 is about 899.9461823786.

The spelling of 728869231 in words is "seven hundred twenty-eight million, eight hundred sixty-nine thousand, two hundred thirty-one".