28207329 has 8 divisors (see below), whose sum is σ = 37634592. Its totient is φ = 18792480.

The previous prime is 28207327. The next prime is 28207331. The reversal of 28207329 is 92370282.

It is an interprime number because it is at equal distance from previous prime (28207327) and next prime (28207331).

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

It is not a de Polignac number, because 28207329 - 2¹ = 28207327 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 28207329.

It is not an unprimeable number, because it can be changed into a prime (28207327) 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 7 ways as a sum of consecutive naturals, for example, 6114 + ... + 9684.

It is an arithmetic number, because the mean of its divisors is an integer number (4704324).

Almost surely, 2^28207329 is an apocalyptic number.

It is an amenable number.

28207329 is a deficient number, since it is larger than the sum of its proper divisors (9427263).

28207329 is a wasteful number, since it uses less digits than its factorization.

28207329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6207.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 28207329 is about 5311.0572393828. The cubic root of 28207329 is about 304.4065464761.

The spelling of 28207329 in words is "twenty-eight million, two hundred seven thousand, three hundred twenty-nine".