28029329 has 4 divisors (see below), whose sum is σ = 28086000. Its totient is φ = 27972660.

The previous prime is 28029289. The next prime is 28029347. The reversal of 28029329 is 92392082.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28029329 - 2²⁰ = 26980753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28029359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27587 + ... + 28584.

It is an arithmetic number, because the mean of its divisors is an integer number (7021500).

Almost surely, 2^28029329 is an apocalyptic number.

It is an amenable number.

28029329 is a deficient number, since it is larger than the sum of its proper divisors (56671).

28029329 is an equidigital number, since it uses as much as digits as its factorization.

28029329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56670.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 28029329 is about 5294.2732267989. The cubic root of 28029329 is about 303.7648841403.

The spelling of 28029329 in words is "twenty-eight million, twenty-nine thousand, three hundred twenty-nine".