728369831 has 16 divisors (see below), whose sum is σ = 875501568. Its totient is φ = 592768800.

The previous prime is 728369801. The next prime is 728369833. The reversal of 728369831 is 138963827.

728369831 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 728369831 - 2⁶ = 728369767 is a prime.

It is a super-2 number, since 2×728369831² = 1061045221421937122, 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 (728369833) 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, 20165 + ... + 43166.

It is an arithmetic number, because the mean of its divisors is an integer number (54718848).

Almost surely, 2^728369831 is an apocalyptic number.

728369831 is a deficient number, since it is larger than the sum of its proper divisors (147131737).

728369831 is a wasteful number, since it uses less digits than its factorization.

728369831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63422.

The product of its digits is 435456, while the sum is 47.

The square root of 728369831 is about 26988.3276806845. The cubic root of 728369831 is about 899.7405964337.

The spelling of 728369831 in words is "seven hundred twenty-eight million, three hundred sixty-nine thousand, eight hundred thirty-one".