28339771 has 2 divisors, whose sum is σ = 28339772. Its totient is φ = 28339770.

The previous prime is 28339763. The next prime is 28339781. The reversal of 28339771 is 17793382.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28339771 - 2³ = 28339763 is a prime.

It is not a weakly prime, because it can be changed into another prime (28339711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14169885 + 14169886.

It is an arithmetic number, because the mean of its divisors is an integer number (14169886).

Almost surely, 2^28339771 is an apocalyptic number.

28339771 is a deficient number, since it is larger than the sum of its proper divisors (1).

28339771 is an equidigital number, since it uses as much as digits as its factorization.

28339771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63504, while the sum is 40.

The square root of 28339771 is about 5323.5111533649. The cubic root of 28339771 is about 304.8822299051.

The spelling of 28339771 in words is "twenty-eight million, three hundred thirty-nine thousand, seven hundred seventy-one".