28337009 has 2 divisors, whose sum is σ = 28337010. Its totient is φ = 28337008.

The previous prime is 28336991. The next prime is 28337041. The reversal of 28337009 is 90073382.

It is an a-pointer prime, because the next prime (28337041) can be obtained adding 28337009 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28090000 + 247009 = 5300^2 + 497^2 .

It is a cyclic number.

It is not a de Polignac number, because 28337009 - 2⁸ = 28336753 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (28337059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14168504 + 14168505.

It is an arithmetic number, because the mean of its divisors is an integer number (14168505).

Almost surely, 2^28337009 is an apocalyptic number.

It is an amenable number.

28337009 is a deficient number, since it is larger than the sum of its proper divisors (1).

28337009 is an equidigital number, since it uses as much as digits as its factorization.

28337009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 28337009 is about 5323.2517317895. The cubic root of 28337009 is about 304.8723249547.

The spelling of 28337009 in words is "twenty-eight million, three hundred thirty-seven thousand, nine".