28809611 has 8 divisors (see below), whose sum is σ = 30559680. Its totient is φ = 27065728.

The previous prime is 28809587. The next prime is 28809617. The reversal of 28809611 is 11690882.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28809611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28809617) 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, 11045 + ... + 13401.

It is an arithmetic number, because the mean of its divisors is an integer number (3819960).

Almost surely, 2^28809611 is an apocalyptic number.

28809611 is a deficient number, since it is larger than the sum of its proper divisors (1750069).

28809611 is a wasteful number, since it uses less digits than its factorization.

28809611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3093.

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 28809611 is about 5367.4585233609. The cubic root of 28809611 is about 306.5578663872.

The spelling of 28809611 in words is "twenty-eight million, eight hundred nine thousand, six hundred eleven".