28018429 has 2 divisors, whose sum is σ = 28018430. Its totient is φ = 28018428.

The previous prime is 28018427. The next prime is 28018447. The reversal of 28018429 is 92481082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25452025 + 2566404 = 5045^2 + 1602^2 .

It is a cyclic number.

It is not a de Polignac number, because 28018429 - 2¹ = 28018427 is a prime.

Together with 28018427, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 28018394 and 28018403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28018423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14009214 + 14009215.

It is an arithmetic number, because the mean of its divisors is an integer number (14009215).

Almost surely, 2^28018429 is an apocalyptic number.

It is an amenable number.

28018429 is a deficient number, since it is larger than the sum of its proper divisors (1).

28018429 is an equidigital number, since it uses as much as digits as its factorization.

28018429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 28018429 is about 5293.2437125075. The cubic root of 28018429 is about 303.7255031699.

The spelling of 28018429 in words is "twenty-eight million, eighteen thousand, four hundred twenty-nine".