28196087 has 2 divisors, whose sum is σ = 28196088. Its totient is φ = 28196086.

The previous prime is 28196027. The next prime is 28196117. The reversal of 28196087 is 78069182.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28196087 - 2⁶ = 28196023 is a prime.

It is a super-2 number, since 2×28196087² = 1590038644223138, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28196027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14098043 + 14098044.

It is an arithmetic number, because the mean of its divisors is an integer number (14098044).

Almost surely, 2^28196087 is an apocalyptic number.

28196087 is a deficient number, since it is larger than the sum of its proper divisors (1).

28196087 is an equidigital number, since it uses as much as digits as its factorization.

28196087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 28196087 is about 5309.9987758944. The cubic root of 28196087 is about 304.3661008042.

The spelling of 28196087 in words is "twenty-eight million, one hundred ninety-six thousand, eighty-seven".