28042211 has 2 divisors, whose sum is σ = 28042212. Its totient is φ = 28042210.

The previous prime is 28042207. The next prime is 28042219. The reversal of 28042211 is 11224082.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28042211 - 2² = 28042207 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28042219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14021105 + 14021106.

It is an arithmetic number, because the mean of its divisors is an integer number (14021106).

Almost surely, 2^28042211 is an apocalyptic number.

28042211 is a deficient number, since it is larger than the sum of its proper divisors (1).

28042211 is an equidigital number, since it uses as much as digits as its factorization.

28042211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 28042211 is about 5295.4896846279. The cubic root of 28042211 is about 303.8114127831.

Adding to 28042211 its reverse (11224082), we get a palindrome (39266293).

The spelling of 28042211 in words is "twenty-eight million, forty-two thousand, two hundred eleven".