28668371 has 2 divisors, whose sum is σ = 28668372. Its totient is φ = 28668370.

The previous prime is 28668337. The next prime is 28668379. The reversal of 28668371 is 17386682.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28668371 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28668379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14334185 + 14334186.

It is an arithmetic number, because the mean of its divisors is an integer number (14334186).

Almost surely, 2^28668371 is an apocalyptic number.

28668371 is a deficient number, since it is larger than the sum of its proper divisors (1).

28668371 is an equidigital number, since it uses as much as digits as its factorization.

28668371 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 41.

The square root of 28668371 is about 5354.2852931087. The cubic root of 28668371 is about 306.0560757016.

The spelling of 28668371 in words is "twenty-eight million, six hundred sixty-eight thousand, three hundred seventy-one".