28075211 has 12 divisors (see below), whose sum is σ = 30363768. Its totient is φ = 25863552.

The previous prime is 28075207. The next prime is 28075231. The reversal of 28075211 is 11257082.

It is not a de Polignac number, because 28075211 - 2² = 28075207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28075231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 178745 + ... + 178901.

It is an arithmetic number, because the mean of its divisors is an integer number (2530314).

Almost surely, 2^28075211 is an apocalyptic number.

28075211 is a deficient number, since it is larger than the sum of its proper divisors (2288557).

28075211 is an equidigital number, since it uses as much as digits as its factorization.

28075211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398 (or 241 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 28075211 is about 5298.6046276355. The cubic root of 28075211 is about 303.9305408888.

The spelling of 28075211 in words is "twenty-eight million, seventy-five thousand, two hundred eleven".