28126507 has 2 divisors, whose sum is σ = 28126508. Its totient is φ = 28126506.

The previous prime is 28126481. The next prime is 28126523. The reversal of 28126507 is 70562182.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28126507 - 2¹⁵ = 28093739 is a prime.

It is a super-2 number, since 2×28126507² = 1582200792042098, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28126537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14063253 + 14063254.

It is an arithmetic number, because the mean of its divisors is an integer number (14063254).

Almost surely, 2^28126507 is an apocalyptic number.

28126507 is a deficient number, since it is larger than the sum of its proper divisors (1).

28126507 is an equidigital number, since it uses as much as digits as its factorization.

28126507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 28126507 is about 5303.4429383185. The cubic root of 28126507 is about 304.1155313133.

Adding to 28126507 its reverse (70562182), we get a palindrome (98688689).

The spelling of 28126507 in words is "twenty-eight million, one hundred twenty-six thousand, five hundred seven".