28580329 has 4 divisors (see below), whose sum is σ = 29822976. Its totient is φ = 27337684.

The previous prime is 28580311. The next prime is 28580333. The reversal of 28580329 is 92308582.

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 28580329 - 2⁵ = 28580297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28580309) 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, 621289 + ... + 621334.

It is an arithmetic number, because the mean of its divisors is an integer number (7455744).

Almost surely, 2^28580329 is an apocalyptic number.

It is an amenable number.

28580329 is a deficient number, since it is larger than the sum of its proper divisors (1242647).

28580329 is a wasteful number, since it uses less digits than its factorization.

28580329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1242646.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 28580329 is about 5346.0573322777. The cubic root of 28580329 is about 305.7424499276.

The spelling of 28580329 in words is "twenty-eight million, five hundred eighty thousand, three hundred twenty-nine".