28680811 has 2 divisors, whose sum is σ = 28680812. Its totient is φ = 28680810.

The previous prime is 28680781. The next prime is 28680829. The reversal of 28680811 is 11808682.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28680811 - 2⁵ = 28680779 is a prime.

It is not a weakly prime, because it can be changed into another prime (28680881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14340405 + 14340406.

It is an arithmetic number, because the mean of its divisors is an integer number (14340406).

Almost surely, 2^28680811 is an apocalyptic number.

28680811 is a deficient number, since it is larger than the sum of its proper divisors (1).

28680811 is an equidigital number, since it uses as much as digits as its factorization.

28680811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6144, while the sum is 34.

The square root of 28680811 is about 5355.4468534381. The cubic root of 28680811 is about 306.1003380353.

The spelling of 28680811 in words is "twenty-eight million, six hundred eighty thousand, eight hundred eleven".