28857144443 has 2 divisors, whose sum is σ = 28857144444. Its totient is φ = 28857144442.

The previous prime is 28857144439. The next prime is 28857144497. The reversal of 28857144443 is 34444175882.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28857144443 - 2² = 28857144439 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 28857144391 and 28857144400.

It is not a weakly prime, because it can be changed into another prime (28857144403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14428572221 + 14428572222.

It is an arithmetic number, because the mean of its divisors is an integer number (14428572222).

Almost surely, 2^28857144443 is an apocalyptic number.

28857144443 is a deficient number, since it is larger than the sum of its proper divisors (1).

28857144443 is an equidigital number, since it uses as much as digits as its factorization.

28857144443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3440640, while the sum is 50.

The spelling of 28857144443 in words is "twenty-eight billion, eight hundred fifty-seven million, one hundred forty-four thousand, four hundred forty-three".