28184320979 has 2 divisors, whose sum is σ = 28184320980. Its totient is φ = 28184320978.

The previous prime is 28184320951. The next prime is 28184320987. The reversal of 28184320979 is 97902348182.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28184320979 - 2²⁸ = 27915885523 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28184320979.

It is not a weakly prime, because it can be changed into another prime (28184325979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14092160489 + 14092160490.

It is an arithmetic number, because the mean of its divisors is an integer number (14092160490).

Almost surely, 2^28184320979 is an apocalyptic number.

28184320979 is a deficient number, since it is larger than the sum of its proper divisors (1).

28184320979 is an equidigital number, since it uses as much as digits as its factorization.

28184320979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1741824, while the sum is 53.

The spelling of 28184320979 in words is "twenty-eight billion, one hundred eighty-four million, three hundred twenty thousand, nine hundred seventy-nine".