28888887143021 has 2 divisors, whose sum is σ = 28888887143022. Its totient is φ = 28888887143020.

The previous prime is 28888887142991. The next prime is 28888887143023. The reversal of 28888887143021 is 12034178888882.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28341930753796 + 546956389225 = 5323714^2 + 739565^2 .

It is a cyclic number.

It is not a de Polignac number, because 28888887143021 - 2⁶ = 28888887142957 is a prime.

Together with 28888887143023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28888887143023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14444443571510 + 14444443571511.

It is an arithmetic number, because the mean of its divisors is an integer number (14444443571511).

Almost surely, 2^{28888887143021} is an apocalyptic number.

It is an amenable number.

28888887143021 is a deficient number, since it is larger than the sum of its proper divisors (1).

28888887143021 is an equidigital number, since it uses as much as digits as its factorization.

28888887143021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 88080384, while the sum is 68.

The spelling of 28888887143021 in words is "twenty-eight trillion, eight hundred eighty-eight billion, eight hundred eighty-seven million, one hundred forty-three thousand, twenty-one".