28573329 has 4 divisors (see below), whose sum is σ = 38097776. Its totient is φ = 19048884.

The previous prime is 28573319. The next prime is 28573357. The reversal of 28573329 is 92337582.

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 28573329 - 2⁴ = 28573313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28573319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4762219 + ... + 4762224.

It is an arithmetic number, because the mean of its divisors is an integer number (9524444).

Almost surely, 2^28573329 is an apocalyptic number.

It is an amenable number.

28573329 is a deficient number, since it is larger than the sum of its proper divisors (9524447).

28573329 is an equidigital number, since it uses as much as digits as its factorization.

28573329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9524446.

The product of its digits is 90720, while the sum is 39.

The square root of 28573329 is about 5345.4026041076. The cubic root of 28573329 is about 305.7174866985.

The spelling of 28573329 in words is "twenty-eight million, five hundred seventy-three thousand, three hundred twenty-nine".