28056907 has 2 divisors, whose sum is σ = 28056908. Its totient is φ = 28056906.

The previous prime is 28056869. The next prime is 28056943. The reversal of 28056907 is 70965082.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28056907 is a prime.

It is a super-3 number, since 3×28056907³ (a number of 23 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (28026907) 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, 14028453 + 14028454.

It is an arithmetic number, because the mean of its divisors is an integer number (14028454).

Almost surely, 2^28056907 is an apocalyptic number.

28056907 is a deficient number, since it is larger than the sum of its proper divisors (1).

28056907 is an equidigital number, since it uses as much as digits as its factorization.

28056907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 28056907 is about 5296.8770988196. The cubic root of 28056907 is about 303.8644760360.

The spelling of 28056907 in words is "twenty-eight million, fifty-six thousand, nine hundred seven".