289399821864 has 32 divisors (see below), whose sum is σ = 725781906720. Its totient is φ = 96162293696.

The previous prime is 289399821853. The next prime is 289399821899. The reversal of 289399821864 is 468128993982.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19011834 + ... + 19027049.

It is an arithmetic number, because the mean of its divisors is an integer number (22680684585).

Almost surely, 2^289399821864 is an apocalyptic number.

289399821864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

289399821864 is an abundant number, since it is smaller than the sum of its proper divisors (436382084856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

289399821864 is a wasteful number, since it uses less digits than its factorization.

289399821864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38039209 (or 38039205 counting only the distinct ones).

The product of its digits is 107495424, while the sum is 69.

The spelling of 289399821864 in words is "two hundred eighty-nine billion, three hundred ninety-nine million, eight hundred twenty-one thousand, eight hundred sixty-four".