729028 has 24 divisors (see below), whose sum is σ = 1378944. Its totient is φ = 336000.

The previous prime is 729023. The next prime is 729037. The reversal of 729028 is 820927.

729028 is a nontrivial binomial coefficient, being equal to C(1208, 2).

It is a junction number, because it is equal to n+sod(n) for n = 728987 and 729005.

It is not an unprimeable number, because it can be changed into a prime (729023) by changing a digit.

729028 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 7 ways as a sum of consecutive naturals, for example, 4753 + ... + 4903.

It is an arithmetic number, because the mean of its divisors is an integer number (57456).

2⁷²⁹⁰²⁸ is an apocalyptic number.

729028 is the 1207-th triangular number and also the 604-th hexagonal number.

729028 is the 403-rd centered nonagonal number.

It is an amenable number.

729028 is a deficient number, since it is larger than the sum of its proper divisors (649916).

729028 is a wasteful number, since it uses less digits than its factorization.

729028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243 (or 241 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 729028 is about 853.8313650833. The cubic root of 729028 is about 90.0011522486.

Subtracting from 729028 its sum of digits (28), we obtain a cube (729000 = 90³).

The spelling of 729028 in words is "seven hundred twenty-nine thousand, twenty-eight".