28143107 has 2 divisors, whose sum is σ = 28143108. Its totient is φ = 28143106.

The previous prime is 28143103. The next prime is 28143127. The reversal of 28143107 is 70134182.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28143107 - 2² = 28143103 is a prime.

It is a super-2 number, since 2×28143107² = 1584068943226898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28143103) 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, 14071553 + 14071554.

It is an arithmetic number, because the mean of its divisors is an integer number (14071554).

Almost surely, 2^28143107 is an apocalyptic number.

28143107 is a deficient number, since it is larger than the sum of its proper divisors (1).

28143107 is an equidigital number, since it uses as much as digits as its factorization.

28143107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 28143107 is about 5305.0077285523. The cubic root of 28143107 is about 304.1753482562.

Adding to 28143107 its reverse (70134182), we get a palindrome (98277289).

The spelling of 28143107 in words is "twenty-eight million, one hundred forty-three thousand, one hundred seven".