28812205 has 8 divisors (see below), whose sum is σ = 34991712. Its totient is φ = 22771728.

The previous prime is 28812181. The next prime is 28812209. The reversal of 28812205 is 50221882.

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

It is a cyclic number.

It is not a de Polignac number, because 28812205 - 2¹¹ = 28810157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28812209) 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, 34299 + ... + 35128.

It is an arithmetic number, because the mean of its divisors is an integer number (4373964).

Almost surely, 2^28812205 is an apocalyptic number.

It is an amenable number.

28812205 is a deficient number, since it is larger than the sum of its proper divisors (6179507).

28812205 is an equidigital number, since it uses as much as digits as its factorization.

28812205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69515.

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 28812205 is about 5367.7001592861. The cubic root of 28812205 is about 306.5670668729.

The spelling of 28812205 in words is "twenty-eight million, eight hundred twelve thousand, two hundred five".