28286507 has 2 divisors, whose sum is σ = 28286508. Its totient is φ = 28286506.

The previous prime is 28286501. The next prime is 28286509. The reversal of 28286507 is 70568282.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28286507 - 2¹⁰ = 28285483 is a prime.

It is a super-2 number, since 2×28286507² = 1600252956522098, which contains 22 as substring.

Together with 28286509, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28286501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14143253 + 14143254.

It is an arithmetic number, because the mean of its divisors is an integer number (14143254).

Almost surely, 2^28286507 is an apocalyptic number.

28286507 is a deficient number, since it is larger than the sum of its proper divisors (1).

28286507 is an equidigital number, since it uses as much as digits as its factorization.

28286507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 53760, while the sum is 38.

The square root of 28286507 is about 5318.5060872392. The cubic root of 28286507 is about 304.6911035489.

The spelling of 28286507 in words is "twenty-eight million, two hundred eighty-six thousand, five hundred seven".