28069451 has 2 divisors, whose sum is σ = 28069452. Its totient is φ = 28069450.

The previous prime is 28069439. The next prime is 28069471. The reversal of 28069451 is 15496082.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28069451 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28069471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14034725 + 14034726.

It is an arithmetic number, because the mean of its divisors is an integer number (14034726).

Almost surely, 2^28069451 is an apocalyptic number.

28069451 is a deficient number, since it is larger than the sum of its proper divisors (1).

28069451 is an equidigital number, since it uses as much as digits as its factorization.

28069451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 28069451 is about 5298.0610604258. The cubic root of 28069451 is about 303.9097543468.

The spelling of 28069451 in words is "twenty-eight million, sixty-nine thousand, four hundred fifty-one".