28847207 has 2 divisors, whose sum is σ = 28847208. Its totient is φ = 28847206.

The previous prime is 28847197. The next prime is 28847213. The reversal of 28847207 is 70274882.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28847207 is a prime.

It is a super-2 number, since 2×28847207² = 1664322703401698, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28847297) 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, 14423603 + 14423604.

It is an arithmetic number, because the mean of its divisors is an integer number (14423604).

Almost surely, 2^28847207 is an apocalyptic number.

28847207 is a deficient number, since it is larger than the sum of its proper divisors (1).

28847207 is an equidigital number, since it uses as much as digits as its factorization.

28847207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50176, while the sum is 38.

The square root of 28847207 is about 5370.9595976883. The cubic root of 28847207 is about 306.6911591707.

The spelling of 28847207 in words is "twenty-eight million, eight hundred forty-seven thousand, two hundred seven".