28067420687 has 2 divisors, whose sum is σ = 28067420688. Its totient is φ = 28067420686.

The previous prime is 28067420683. The next prime is 28067420713. The reversal of 28067420687 is 78602476082.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28067420687 - 2² = 28067420683 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28067420681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14033710343 + 14033710344.

It is an arithmetic number, because the mean of its divisors is an integer number (14033710344).

Almost surely, 2^28067420687 is an apocalyptic number.

28067420687 is a deficient number, since it is larger than the sum of its proper divisors (1).

28067420687 is an equidigital number, since it uses as much as digits as its factorization.

28067420687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1806336, while the sum is 50.

The spelling of 28067420687 in words is "twenty-eight billion, sixty-seven million, four hundred twenty thousand, six hundred eighty-seven".