28822789 has 2 divisors, whose sum is σ = 28822790. Its totient is φ = 28822788.

The previous prime is 28822763. The next prime is 28822817. The reversal of 28822789 is 98722882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26316900 + 2505889 = 5130^2 + 1583^2 .

It is a cyclic number.

It is not a de Polignac number, because 28822789 - 2⁵ = 28822757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28822589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14411394 + 14411395.

It is an arithmetic number, because the mean of its divisors is an integer number (14411395).

Almost surely, 2^28822789 is an apocalyptic number.

It is an amenable number.

28822789 is a deficient number, since it is larger than the sum of its proper divisors (1).

28822789 is an equidigital number, since it uses as much as digits as its factorization.

28822789 is an evil number, because the sum of its binary digits is even.

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

The square root of 28822789 is about 5368.6859658579. The cubic root of 28822789 is about 306.6046008347.

It can be divided in two parts, 2882 and 2789, that added together give a triangular number (5671 = T₁₀₆).

The spelling of 28822789 in words is "twenty-eight million, eight hundred twenty-two thousand, seven hundred eighty-nine".