28759609 has 12 divisors (see below), whose sum is σ = 29961360. Its totient is φ = 27596400.

The previous prime is 28759603. The next prime is 28759667. The reversal of 28759609 is 90695782.

It is not a de Polignac number, because 28759609 - 2⁷ = 28759481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28759603) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 219474 + ... + 219604.

It is an arithmetic number, because the mean of its divisors is an integer number (2496780).

Almost surely, 2^28759609 is an apocalyptic number.

It is an amenable number.

28759609 is a deficient number, since it is larger than the sum of its proper divisors (1201751).

28759609 is an equidigital number, since it uses as much as digits as its factorization.

28759609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312 (or 251 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 28759609 is about 5362.7986163942. The cubic root of 28759609 is about 306.3804095997.

The spelling of 28759609 in words is "twenty-eight million, seven hundred fifty-nine thousand, six hundred nine".