28679609 has 8 divisors (see below), whose sum is σ = 32851200. Its totient is φ = 24526656.

The previous prime is 28679593. The next prime is 28679611. The reversal of 28679609 is 90697682.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28679609 - 2⁴ = 28679593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28679639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1184 + ... + 7665.

It is an arithmetic number, because the mean of its divisors is an integer number (4106400).

Almost surely, 2^28679609 is an apocalyptic number.

It is an amenable number.

28679609 is a deficient number, since it is larger than the sum of its proper divisors (4171591).

28679609 is an equidigital number, since it uses as much as digits as its factorization.

28679609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9319.

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 28679609 is about 5355.3346300675. The cubic root of 28679609 is about 306.0960617993.

The spelling of 28679609 in words is "twenty-eight million, six hundred seventy-nine thousand, six hundred nine".