28864211 has 4 divisors (see below), whose sum is σ = 30383400. Its totient is φ = 27345024.

The previous prime is 28864207. The next prime is 28864217. The reversal of 28864211 is 11246882.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28864211 - 2² = 28864207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28864217) 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, 759566 + ... + 759603.

It is an arithmetic number, because the mean of its divisors is an integer number (7595850).

Almost surely, 2^28864211 is an apocalyptic number.

28864211 is a deficient number, since it is larger than the sum of its proper divisors (1519189).

28864211 is a wasteful number, since it uses less digits than its factorization.

28864211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1519188.

The product of its digits is 6144, while the sum is 32.

The square root of 28864211 is about 5372.5423218435. The cubic root of 28864211 is about 306.7514070848.

The spelling of 28864211 in words is "twenty-eight million, eight hundred sixty-four thousand, two hundred eleven".