28003007 has 2 divisors, whose sum is σ = 28003008. Its totient is φ = 28003006.

The previous prime is 28002971. The next prime is 28003021. The reversal of 28003007 is 70030082.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28003007 - 2¹⁸ = 27740863 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 28003007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28003037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14001503 + 14001504.

It is an arithmetic number, because the mean of its divisors is an integer number (14001504).

Almost surely, 2^28003007 is an apocalyptic number.

28003007 is a deficient number, since it is larger than the sum of its proper divisors (1).

28003007 is an equidigital number, since it uses as much as digits as its factorization.

28003007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 28003007 is about 5291.7867492937. The cubic root of 28003007 is about 303.6697670640.

Adding to 28003007 its reverse (70030082), we get a palindrome (98033089).

The spelling of 28003007 in words is "twenty-eight million, three thousand, seven".