28287146443 has 2 divisors, whose sum is σ = 28287146444. Its totient is φ = 28287146442.

The previous prime is 28287146417. The next prime is 28287146449. The reversal of 28287146443 is 34464178282.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28287146443 is a prime.

It is not a weakly prime, because it can be changed into another prime (28287146449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14143573221 + 14143573222.

It is an arithmetic number, because the mean of its divisors is an integer number (14143573222).

Almost surely, 2^28287146443 is an apocalyptic number.

28287146443 is a deficient number, since it is larger than the sum of its proper divisors (1).

28287146443 is an equidigital number, since it uses as much as digits as its factorization.

28287146443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2064384, while the sum is 49.

The spelling of 28287146443 in words is "twenty-eight billion, two hundred eighty-seven million, one hundred forty-six thousand, four hundred forty-three".