28252507 has 2 divisors, whose sum is σ = 28252508. Its totient is φ = 28252506.

The previous prime is 28252489. The next prime is 28252517. The reversal of 28252507 is 70525282.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28252507 - 2⁷ = 28252379 is a prime.

It is not a weakly prime, because it can be changed into another prime (28252517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14126253 + 14126254.

It is an arithmetic number, because the mean of its divisors is an integer number (14126254).

Almost surely, 2^28252507 is an apocalyptic number.

28252507 is a deficient number, since it is larger than the sum of its proper divisors (1).

28252507 is an equidigital number, since it uses as much as digits as its factorization.

28252507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11200, while the sum is 31.

The square root of 28252507 is about 5315.3087398570. The cubic root of 28252507 is about 304.5689764047.

Adding to 28252507 its reverse (70525282), we get a palindrome (98777789).

The spelling of 28252507 in words is "twenty-eight million, two hundred fifty-two thousand, five hundred seven".