28007071 has 2 divisors, whose sum is σ = 28007072. Its totient is φ = 28007070.

The previous prime is 28007017. The next prime is 28007087. The reversal of 28007071 is 17070082.

It is a happy number.

Together with previous prime (28007017) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28007071 - 2¹¹ = 28005023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28007471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14003535 + 14003536.

It is an arithmetic number, because the mean of its divisors is an integer number (14003536).

Almost surely, 2^28007071 is an apocalyptic number.

28007071 is a deficient number, since it is larger than the sum of its proper divisors (1).

28007071 is an equidigital number, since it uses as much as digits as its factorization.

28007071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 784, while the sum is 25.

The square root of 28007071 is about 5292.1707266489. The cubic root of 28007071 is about 303.6844566083.

The spelling of 28007071 in words is "twenty-eight million, seven thousand, seventy-one".