28024329 has 4 divisors (see below), whose sum is σ = 37365776. Its totient is φ = 18682884.

The previous prime is 28024319. The next prime is 28024331. The reversal of 28024329 is 92342082.

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 not a de Polignac number, because 28024329 - 2¹³ = 28016137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28024296 and 28024305.

It is not an unprimeable number, because it can be changed into a prime (28024319) 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, 4670719 + ... + 4670724.

It is an arithmetic number, because the mean of its divisors is an integer number (9341444).

Almost surely, 2^28024329 is an apocalyptic number.

It is an amenable number.

28024329 is a deficient number, since it is larger than the sum of its proper divisors (9341447).

28024329 is an equidigital number, since it uses as much as digits as its factorization.

28024329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9341446.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 28024329 is about 5293.8009973931. The cubic root of 28024329 is about 303.7468207427.

The spelling of 28024329 in words is "twenty-eight million, twenty-four thousand, three hundred twenty-nine".