28056106487 has 2 divisors, whose sum is σ = 28056106488. Its totient is φ = 28056106486.

The previous prime is 28056106433. The next prime is 28056106597. The reversal of 28056106487 is 78460165082.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28056106487 - 2²⁸ = 27787671031 is a prime.

It is a super-2 number, since 2×28056106487² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28056106427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14028053243 + 14028053244.

It is an arithmetic number, because the mean of its divisors is an integer number (14028053244).

Almost surely, 2^28056106487 is an apocalyptic number.

28056106487 is a deficient number, since it is larger than the sum of its proper divisors (1).

28056106487 is an equidigital number, since it uses as much as digits as its factorization.

28056106487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 645120, while the sum is 47.

The spelling of 28056106487 in words is "twenty-eight billion, fifty-six million, one hundred six thousand, four hundred eighty-seven".