28782829 has 2 divisors, whose sum is σ = 28782830. Its totient is φ = 28782828.

The previous prime is 28782827. The next prime is 28782839. The reversal of 28782829 is 92828782.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28068804 + 714025 = 5298^2 + 845^2 .

It is a cyclic number.

It is not a de Polignac number, because 28782829 - 2¹ = 28782827 is a prime.

Together with 28782827, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28782827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14391414 + 14391415.

It is an arithmetic number, because the mean of its divisors is an integer number (14391415).

Almost surely, 2^28782829 is an apocalyptic number.

It is an amenable number.

28782829 is a deficient number, since it is larger than the sum of its proper divisors (1).

28782829 is an equidigital number, since it uses as much as digits as its factorization.

28782829 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 258048, while the sum is 46.

The square root of 28782829 is about 5364.9630940017. The cubic root of 28782829 is about 306.4628427945.

The spelling of 28782829 in words is "twenty-eight million, seven hundred eighty-two thousand, eight hundred twenty-nine".