28942429 has 2 divisors, whose sum is σ = 28942430. Its totient is φ = 28942428.

The previous prime is 28942393. The next prime is 28942439. The reversal of 28942429 is 92424982.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26988025 + 1954404 = 5195^2 + 1398^2 .

It is a cyclic number.

It is not a de Polignac number, because 28942429 - 2²¹ = 26845277 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28942391 and 28942400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28942439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14471214 + 14471215.

It is an arithmetic number, because the mean of its divisors is an integer number (14471215).

Almost surely, 2^28942429 is an apocalyptic number.

It is an amenable number.

28942429 is a deficient number, since it is larger than the sum of its proper divisors (1).

28942429 is an equidigital number, since it uses as much as digits as its factorization.

28942429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82944, while the sum is 40.

The square root of 28942429 is about 5379.8168184428. The cubic root of 28942429 is about 307.0282417334.

The spelling of 28942429 in words is "twenty-eight million, nine hundred forty-two thousand, four hundred twenty-nine".