28427947 has 2 divisors, whose sum is σ = 28427948. Its totient is φ = 28427946.

The previous prime is 28427929. The next prime is 28427953. The reversal of 28427947 is 74972482.

28427947 is nontrivially palindromic in base 5.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28427947 - 2²³ = 20039339 is a prime.

It is not a weakly prime, because it can be changed into another prime (28427957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14213973 + 14213974.

It is an arithmetic number, because the mean of its divisors is an integer number (14213974).

Almost surely, 2^28427947 is an apocalyptic number.

28427947 is a deficient number, since it is larger than the sum of its proper divisors (1).

28427947 is an equidigital number, since it uses as much as digits as its factorization.

28427947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 225792, while the sum is 43.

The square root of 28427947 is about 5331.7864735940. The cubic root of 28427947 is about 305.1981047482.

The spelling of 28427947 in words is "twenty-eight million, four hundred twenty-seven thousand, nine hundred forty-seven".