28856922643 has 2 divisors, whose sum is σ = 28856922644. Its totient is φ = 28856922642.

The previous prime is 28856922641. The next prime is 28856922659. The reversal of 28856922643 is 34622965882.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28856922643 - 2¹ = 28856922641 is a prime.

It is a super-2 number, since 2×28856922643² (a number of 22 digits) contains 22 as substring.

Together with 28856922641, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (28856922641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14428461321 + 14428461322.

It is an arithmetic number, because the mean of its divisors is an integer number (14428461322).

Almost surely, 2^28856922643 is an apocalyptic number.

28856922643 is a deficient number, since it is larger than the sum of its proper divisors (1).

28856922643 is an equidigital number, since it uses as much as digits as its factorization.

28856922643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9953280, while the sum is 55.

The spelling of 28856922643 in words is "twenty-eight billion, eight hundred fifty-six million, nine hundred twenty-two thousand, six hundred forty-three".