28067939 has 2 divisors, whose sum is σ = 28067940. Its totient is φ = 28067938.

The previous prime is 28067891. The next prime is 28067951. The reversal of 28067939 is 93976082.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28067939 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28067939.

It is not a weakly prime, because it can be changed into another prime (28067999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14033969 + 14033970.

It is an arithmetic number, because the mean of its divisors is an integer number (14033970).

Almost surely, 2^28067939 is an apocalyptic number.

28067939 is a deficient number, since it is larger than the sum of its proper divisors (1).

28067939 is an equidigital number, since it uses as much as digits as its factorization.

28067939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 28067939 is about 5297.9183647920. The cubic root of 28067939 is about 303.9042974084.

The spelling of 28067939 in words is "twenty-eight million, sixty-seven thousand, nine hundred thirty-nine".