28079999 has 2 divisors, whose sum is σ = 28080000. Its totient is φ = 28079998.

The previous prime is 28079993. The next prime is 28080001. The reversal of 28079999 is 99997082.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28079999 - 2¹⁶ = 28014463 is a prime.

Together with 28080001, it forms a pair of twin primes.

It is a Chen prime.

28079999 is a modest number, since divided by 9999 gives 2807 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 28079999.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28079993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14039999 + 14040000.

It is an arithmetic number, because the mean of its divisors is an integer number (14040000).

Almost surely, 2^28079999 is an apocalyptic number.

28079999 is a deficient number, since it is larger than the sum of its proper divisors (1).

28079999 is an equidigital number, since it uses as much as digits as its factorization.

28079999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 734832, while the sum is 53.

The square root of 28079999 is about 5299.0564254403. The cubic root of 28079999 is about 303.9478175379.

The spelling of 28079999 in words is "twenty-eight million, seventy-nine thousand, nine hundred ninety-nine".