28860357991 has 2 divisors, whose sum is σ = 28860357992. Its totient is φ = 28860357990.

The previous prime is 28860357961. The next prime is 28860358039. The reversal of 28860357991 is 19975306882.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28860357991 - 2¹¹ = 28860355943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28860357941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14430178995 + 14430178996.

It is an arithmetic number, because the mean of its divisors is an integer number (14430178996).

Almost surely, 2^28860357991 is an apocalyptic number.

28860357991 is a deficient number, since it is larger than the sum of its proper divisors (1).

28860357991 is an equidigital number, since it uses as much as digits as its factorization.

28860357991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6531840, while the sum is 58.

The spelling of 28860357991 in words is "twenty-eight billion, eight hundred sixty million, three hundred fifty-seven thousand, nine hundred ninety-one".