28211879 has 2 divisors, whose sum is σ = 28211880. Its totient is φ = 28211878.

The previous prime is 28211861. The next prime is 28211893. The reversal of 28211879 is 97811282.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28211879 - 2²⁰ = 27163303 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28211839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14105939 + 14105940.

It is an arithmetic number, because the mean of its divisors is an integer number (14105940).

Almost surely, 2^28211879 is an apocalyptic number.

28211879 is a deficient number, since it is larger than the sum of its proper divisors (1).

28211879 is an equidigital number, since it uses as much as digits as its factorization.

28211879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 38.

The square root of 28211879 is about 5311.4855737355. The cubic root of 28211879 is about 304.4229130892.

The spelling of 28211879 in words is "twenty-eight million, two hundred eleven thousand, eight hundred seventy-nine".