28664851 has 2 divisors, whose sum is σ = 28664852. Its totient is φ = 28664850.

The previous prime is 28664849. The next prime is 28664887. The reversal of 28664851 is 15846682.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28664851 - 2¹ = 28664849 is a prime.

Together with 28664849, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (28664821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14332425 + 14332426.

It is an arithmetic number, because the mean of its divisors is an integer number (14332426).

Almost surely, 2^28664851 is an apocalyptic number.

28664851 is a deficient number, since it is larger than the sum of its proper divisors (1).

28664851 is an equidigital number, since it uses as much as digits as its factorization.

28664851 is an evil number, because the sum of its binary digits is even.

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

The square root of 28664851 is about 5353.9565743476. The cubic root of 28664851 is about 306.0435489873.

The spelling of 28664851 in words is "twenty-eight million, six hundred sixty-four thousand, eight hundred fifty-one".