28969211 has 4 divisors (see below), whose sum is σ = 28980000. Its totient is φ = 28958424.

The previous prime is 28969189. The next prime is 28969223. The reversal of 28969211 is 11296982.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28969211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28969511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2165 + ... + 7913.

It is an arithmetic number, because the mean of its divisors is an integer number (7245000).

Almost surely, 2^28969211 is an apocalyptic number.

28969211 is a deficient number, since it is larger than the sum of its proper divisors (10789).

28969211 is an equidigital number, since it uses as much as digits as its factorization.

28969211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10788.

The product of its digits is 15552, while the sum is 38.

The square root of 28969211 is about 5382.3053610883. The cubic root of 28969211 is about 307.1229158343.

The spelling of 28969211 in words is "twenty-eight million, nine hundred sixty-nine thousand, two hundred eleven".