28134709 has 2 divisors, whose sum is σ = 28134710. Its totient is φ = 28134708.

The previous prime is 28134697. The next prime is 28134719. The reversal of 28134709 is 90743182.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16892100 + 11242609 = 4110^2 + 3353^2 .

It is a cyclic number.

It is not a de Polignac number, because 28134709 - 2¹¹ = 28132661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28134719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14067354 + 14067355.

It is an arithmetic number, because the mean of its divisors is an integer number (14067355).

Almost surely, 2^28134709 is an apocalyptic number.

It is an amenable number.

28134709 is a deficient number, since it is larger than the sum of its proper divisors (1).

28134709 is an equidigital number, since it uses as much as digits as its factorization.

28134709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 28134709 is about 5304.2161532125. The cubic root of 28134709 is about 304.1450895893.

The spelling of 28134709 in words is "twenty-eight million, one hundred thirty-four thousand, seven hundred nine".