28684651 has 2 divisors, whose sum is σ = 28684652. Its totient is φ = 28684650.

The previous prime is 28684637. The next prime is 28684673. The reversal of 28684651 is 15648682.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28684651 - 2⁵ = 28684619 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28684681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14342325 + 14342326.

It is an arithmetic number, because the mean of its divisors is an integer number (14342326).

Almost surely, 2^28684651 is an apocalyptic number.

28684651 is a deficient number, since it is larger than the sum of its proper divisors (1).

28684651 is an equidigital number, since it uses as much as digits as its factorization.

28684651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 92160, while the sum is 40.

The square root of 28684651 is about 5355.8053549396. The cubic root of 28684651 is about 306.1139984213.

The spelling of 28684651 in words is "twenty-eight million, six hundred eighty-four thousand, six hundred fifty-one".