28875329 has 16 divisors (see below), whose sum is σ = 34494720. Its totient is φ = 23647680.

The previous prime is 28875313. The next prime is 28875331. The reversal of 28875329 is 92357882.

It is not a de Polignac number, because 28875329 - 2⁴ = 28875313 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28875329.

It is not an unprimeable number, because it can be changed into a prime (28875349) 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 15 ways as a sum of consecutive naturals, for example, 20219 + ... + 21599.

It is an arithmetic number, because the mean of its divisors is an integer number (2155920).

Almost surely, 2^28875329 is an apocalyptic number.

28875329 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

28875329 is a deficient number, since it is larger than the sum of its proper divisors (5619391).

28875329 is a wasteful number, since it uses less digits than its factorization.

28875329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1520.

The product of its digits is 241920, while the sum is 44.

The square root of 28875329 is about 5373.5769278945. The cubic root of 28875329 is about 306.7907871595.

The spelling of 28875329 in words is "twenty-eight million, eight hundred seventy-five thousand, three hundred twenty-nine".