289434339820 has 24 divisors (see below), whose sum is σ = 607852695744. Its totient is φ = 115766006016.

The previous prime is 289434339739. The next prime is 289434339841. The reversal of 289434339820 is 28933434982.

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, 171172 + ... + 779851.

It is an arithmetic number, because the mean of its divisors is an integer number (25327195656).

Almost surely, 2^289434339820 is an apocalyptic number.

289434339820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

289434339820 is an abundant number, since it is smaller than the sum of its proper divisors (318418355924).

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

289434339820 is a wasteful number, since it uses less digits than its factorization.

289434339820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 966249 (or 966247 counting only the distinct ones).

The product of its (nonzero) digits is 8957952, while the sum is 55.

The spelling of 289434339820 in words is "two hundred eighty-nine billion, four hundred thirty-four million, three hundred thirty-nine thousand, eight hundred twenty".