820210286889 has 24 divisors (see below), whose sum is σ = 1400687520960. Its totient is φ = 452529812448.

The previous prime is 820210286887. The next prime is 820210286893. The reversal of 820210286889 is 988682012028.

It is a happy number.

It is not a de Polignac number, because 820210286889 - 2¹ = 820210286887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (820210286887) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 224467327 + ... + 224470980.

It is an arithmetic number, because the mean of its divisors is an integer number (58361980040).

Almost surely, 2^820210286889 is an apocalyptic number.

It is an amenable number.

820210286889 is a deficient number, since it is larger than the sum of its proper divisors (580477234071).

820210286889 is a wasteful number, since it uses less digits than its factorization.

820210286889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448938349 (or 448938346 counting only the distinct ones).

The product of its (nonzero) digits is 1769472, while the sum is 54.

The spelling of 820210286889 in words is "eight hundred twenty billion, two hundred ten million, two hundred eighty-six thousand, eight hundred eighty-nine".