28857438343 has 2 divisors, whose sum is σ = 28857438344. Its totient is φ = 28857438342.

The previous prime is 28857438329. The next prime is 28857438353. The reversal of 28857438343 is 34383475882.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28857438343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28857438353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14428719171 + 14428719172.

It is an arithmetic number, because the mean of its divisors is an integer number (14428719172).

Almost surely, 2^28857438343 is an apocalyptic number.

28857438343 is a deficient number, since it is larger than the sum of its proper divisors (1).

28857438343 is an equidigital number, since it uses as much as digits as its factorization.

28857438343 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15482880, while the sum is 55.

The spelling of 28857438343 in words is "twenty-eight billion, eight hundred fifty-seven million, four hundred thirty-eight thousand, three hundred forty-three".