28427447 has 2 divisors, whose sum is σ = 28427448. Its totient is φ = 28427446.

The previous prime is 28427419. The next prime is 28427459. The reversal of 28427447 is 74472482.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28427447 - 2¹⁰ = 28426423 is a prime.

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 28427447.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28427947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14213723 + 14213724.

It is an arithmetic number, because the mean of its divisors is an integer number (14213724).

Almost surely, 2^28427447 is an apocalyptic number.

28427447 is a deficient number, since it is larger than the sum of its proper divisors (1).

28427447 is an equidigital number, since it uses as much as digits as its factorization.

28427447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 100352, while the sum is 38.

The square root of 28427447 is about 5331.7395847884. The cubic root of 28427447 is about 305.1963154298.

The spelling of 28427447 in words is "twenty-eight million, four hundred twenty-seven thousand, four hundred forty-seven".