8028729 has 12 divisors (see below), whose sum is σ = 11622832. Its totient is φ = 5340600.

The previous prime is 8028719. The next prime is 8028731. The reversal of 8028729 is 9278208.

It is a de Polignac number, because none of the positive numbers 2^k-8028729 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8028693 and 8028702.

It is not an unprimeable number, because it can be changed into a prime (8028719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5574 + ... + 6864.

Almost surely, 2^8028729 is an apocalyptic number.

It is an amenable number.

8028729 is a deficient number, since it is larger than the sum of its proper divisors (3594103).

8028729 is a wasteful number, since it uses less digits than its factorization.

8028729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1988 (or 1985 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 8028729 is about 2833.5011911062. The cubic root of 8028729 is about 200.2391223220.

The spelling of 8028729 in words is "eight million, twenty-eight thousand, seven hundred twenty-nine".