28928211 has 16 divisors (see below), whose sum is σ = 41653920. Its totient is φ = 17752320.

The previous prime is 28928189. The next prime is 28928219. The reversal of 28928211 is 11282982.

It is not a de Polignac number, because 28928211 - 2⁶ = 28928147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28928219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17175 + ... + 18783.

It is an arithmetic number, because the mean of its divisors is an integer number (2603370).

Almost surely, 2^28928211 is an apocalyptic number.

28928211 is a deficient number, since it is larger than the sum of its proper divisors (12725709).

28928211 is a wasteful number, since it uses less digits than its factorization.

28928211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2086.

The product of its digits is 4608, while the sum is 33.

The square root of 28928211 is about 5378.4952356584. The cubic root of 28928211 is about 306.9779575116.

The spelling of 28928211 in words is "twenty-eight million, nine hundred twenty-eight thousand, two hundred eleven".