28827647 has 2 divisors, whose sum is σ = 28827648. Its totient is φ = 28827646.

The previous prime is 28827641. The next prime is 28827649. The reversal of 28827647 is 74672882.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28827647 - 2⁶ = 28827583 is a prime.

Together with 28827649, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 28827598 and 28827607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28827641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14413823 + 14413824.

It is an arithmetic number, because the mean of its divisors is an integer number (14413824).

Almost surely, 2^28827647 is an apocalyptic number.

28827647 is a deficient number, since it is larger than the sum of its proper divisors (1).

28827647 is an equidigital number, since it uses as much as digits as its factorization.

28827647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 301056, while the sum is 44.

The square root of 28827647 is about 5369.1383852533. The cubic root of 28827647 is about 306.6218256480.

The spelling of 28827647 in words is "twenty-eight million, eight hundred twenty-seven thousand, six hundred forty-seven".