28317007 has 2 divisors, whose sum is σ = 28317008. Its totient is φ = 28317006.

The previous prime is 28316989. The next prime is 28317013. The reversal of 28317007 is 70071382.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28317007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28317017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14158503 + 14158504.

It is an arithmetic number, because the mean of its divisors is an integer number (14158504).

Almost surely, 2^28317007 is an apocalyptic number.

28317007 is a deficient number, since it is larger than the sum of its proper divisors (1).

28317007 is an equidigital number, since it uses as much as digits as its factorization.

28317007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 28317007 is about 5321.3726612595. The cubic root of 28317007 is about 304.8005755380.

Adding to 28317007 its reverse (70071382), we get a palindrome (98388389).

The spelling of 28317007 in words is "twenty-eight million, three hundred seventeen thousand, seven".