28976429 has 2 divisors, whose sum is σ = 28976430. Its totient is φ = 28976428.

The previous prime is 28976417. The next prime is 28976443. The reversal of 28976429 is 92467982.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16564900 + 12411529 = 4070^2 + 3523^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28976429 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28976029) 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, 14488214 + 14488215.

It is an arithmetic number, because the mean of its divisors is an integer number (14488215).

Almost surely, 2^28976429 is an apocalyptic number.

It is an amenable number.

28976429 is a deficient number, since it is larger than the sum of its proper divisors (1).

28976429 is an equidigital number, since it uses as much as digits as its factorization.

28976429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 47.

The square root of 28976429 is about 5382.9758498437. The cubic root of 28976429 is about 307.1484214089.

It can be divided in two parts, 289 and 76429, that multiplied together give a triangular number (22087981 = T₆₆₄₆).

The spelling of 28976429 in words is "twenty-eight million, nine hundred seventy-six thousand, four hundred twenty-nine".