28162307 has 2 divisors, whose sum is σ = 28162308. Its totient is φ = 28162306.

The previous prime is 28162273. The next prime is 28162331. The reversal of 28162307 is 70326182.

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-28162307 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28162307.

It is not a weakly prime, because it can be changed into another prime (28162357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14081153 + 14081154.

It is an arithmetic number, because the mean of its divisors is an integer number (14081154).

Almost surely, 2^28162307 is an apocalyptic number.

28162307 is a deficient number, since it is larger than the sum of its proper divisors (1).

28162307 is an equidigital number, since it uses as much as digits as its factorization.

28162307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 28162307 is about 5306.8170309518. The cubic root of 28162307 is about 304.2445047887.

Adding to 28162307 its reverse (70326182), we get a palindrome (98488489).

The spelling of 28162307 in words is "twenty-eight million, one hundred sixty-two thousand, three hundred seven".