28812647 has 2 divisors, whose sum is σ = 28812648. Its totient is φ = 28812646.

The previous prime is 28812611. The next prime is 28812649. The reversal of 28812647 is 74621882.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28812647 - 2¹⁰ = 28811623 is a prime.

Together with 28812649, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28812647.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28812649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14406323 + 14406324.

It is an arithmetic number, because the mean of its divisors is an integer number (14406324).

Almost surely, 2^28812647 is an apocalyptic number.

28812647 is a deficient number, since it is larger than the sum of its proper divisors (1).

28812647 is an equidigital number, since it uses as much as digits as its factorization.

28812647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43008, while the sum is 38.

The square root of 28812647 is about 5367.7413313236. The cubic root of 28812647 is about 306.5686345182.

The spelling of 28812647 in words is "twenty-eight million, eight hundred twelve thousand, six hundred forty-seven".