28979211 has 4 divisors (see below), whose sum is σ = 38638952. Its totient is φ = 19319472.

The previous prime is 28979191. The next prime is 28979219. The reversal of 28979211 is 11297982.

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

It is not a de Polignac number, because 28979211 - 2⁵ = 28979179 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28979211.

It is not an unprimeable number, because it can be changed into a prime (28979219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4829866 + ... + 4829871.

It is an arithmetic number, because the mean of its divisors is an integer number (9659738).

Almost surely, 2^28979211 is an apocalyptic number.

28979211 is a deficient number, since it is larger than the sum of its proper divisors (9659741).

28979211 is an equidigital number, since it uses as much as digits as its factorization.

28979211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9659740.

The product of its digits is 18144, while the sum is 39.

The square root of 28979211 is about 5383.2342508942. The cubic root of 28979211 is about 307.1582507724.

The spelling of 28979211 in words is "twenty-eight million, nine hundred seventy-nine thousand, two hundred eleven".