28768447 has 2 divisors, whose sum is σ = 28768448. Its totient is φ = 28768446.

The previous prime is 28768427. The next prime is 28768457. The reversal of 28768447 is 74486782.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28768447 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28768397 and 28768406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28768427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14384223 + 14384224.

It is an arithmetic number, because the mean of its divisors is an integer number (14384224).

Almost surely, 2^28768447 is an apocalyptic number.

28768447 is a deficient number, since it is larger than the sum of its proper divisors (1).

28768447 is an equidigital number, since it uses as much as digits as its factorization.

28768447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 602112, while the sum is 46.

The square root of 28768447 is about 5363.6225631564. The cubic root of 28768447 is about 306.4117905633.

The spelling of 28768447 in words is "twenty-eight million, seven hundred sixty-eight thousand, four hundred forty-seven".