28871429 has 2 divisors, whose sum is σ = 28871430. Its totient is φ = 28871428.

The previous prime is 28871413. The next prime is 28871459. The reversal of 28871429 is 92417882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24453025 + 4418404 = 4945^2 + 2102^2 .

It is a cyclic number.

It is not a de Polignac number, because 28871429 - 2⁴ = 28871413 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28871459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14435714 + 14435715.

It is an arithmetic number, because the mean of its divisors is an integer number (14435715).

Almost surely, 2^28871429 is an apocalyptic number.

It is an amenable number.

28871429 is a deficient number, since it is larger than the sum of its proper divisors (1).

28871429 is an equidigital number, since it uses as much as digits as its factorization.

28871429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64512, while the sum is 41.

The square root of 28871429 is about 5373.2140288658. The cubic root of 28871429 is about 306.7769744690.

It can be divided in two parts, 288 and 71429, that added together give a palindrome (71717).

The spelling of 28871429 in words is "twenty-eight million, eight hundred seventy-one thousand, four hundred twenty-nine".