28847279 has 2 divisors, whose sum is σ = 28847280. Its totient is φ = 28847278.

The previous prime is 28847243. The next prime is 28847297. The reversal of 28847279 is 97274882.

It is a happy number.

Together with next prime (28847297) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28847279 - 2²⁰ = 27798703 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 (28847219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14423639 + 14423640.

It is an arithmetic number, because the mean of its divisors is an integer number (14423640).

Almost surely, 2^28847279 is an apocalyptic number.

28847279 is a deficient number, since it is larger than the sum of its proper divisors (1).

28847279 is an equidigital number, since it uses as much as digits as its factorization.

28847279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 451584, while the sum is 47.

The square root of 28847279 is about 5370.9663003970. The cubic root of 28847279 is about 306.6914143282.

The spelling of 28847279 in words is "twenty-eight million, eight hundred forty-seven thousand, two hundred seventy-nine".