28822447 has 2 divisors, whose sum is σ = 28822448. Its totient is φ = 28822446.

The previous prime is 28822397. The next prime is 28822457. The reversal of 28822447 is 74422882.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28822447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28822457) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14411223 + 14411224.

It is an arithmetic number, because the mean of its divisors is an integer number (14411224).

Almost surely, 2^28822447 is an apocalyptic number.

28822447 is a deficient number, since it is larger than the sum of its proper divisors (1).

28822447 is an equidigital number, since it uses as much as digits as its factorization.

28822447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 57344, while the sum is 37.

The square root of 28822447 is about 5368.6541143940. The cubic root of 28822447 is about 306.6033881463.

It can be divided in two parts, 2882 and 2447, that added together give a square (5329 = 73²).

The spelling of 28822447 in words is "twenty-eight million, eight hundred twenty-two thousand, four hundred forty-seven".