289817964 has 18 divisors (see below), whose sum is σ = 732595500. Its totient is φ = 96605976.

The previous prime is 289817959. The next prime is 289817987. The reversal of 289817964 is 469718982.

It is a tau number, because it is divible by the number of its divisors (18).

It is a self number, because there is not a number n which added to its sum of digits gives 289817964.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4025214 + ... + 4025285.

It is an arithmetic number, because the mean of its divisors is an integer number (40699750).

Almost surely, 2^289817964 is an apocalyptic number.

It is an amenable number.

289817964 is an abundant number, since it is smaller than the sum of its proper divisors (442777536).

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

289817964 is a wasteful number, since it uses less digits than its factorization.

289817964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8050509 (or 8050504 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 54.

The square root of 289817964 is about 17024.0407659286. The cubic root of 289817964 is about 661.7720697715.

The spelling of 289817964 in words is "two hundred eighty-nine million, eight hundred seventeen thousand, nine hundred sixty-four".