289643664 has 40 divisors (see below), whose sum is σ = 772387072. Its totient is φ = 93432960.

The previous prime is 289643609. The next prime is 289643687. The reversal of 289643664 is 466346982.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95839 + ... + 98814.

Almost surely, 2^289643664 is an apocalyptic number.

289643664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

289643664 is an abundant number, since it is smaller than the sum of its proper divisors (482743408).

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

289643664 is a wasteful number, since it uses less digits than its factorization.

289643664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194695 (or 194689 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 48.

The square root of 289643664 is about 17018.9207648429. The cubic root of 289643664 is about 661.6393772800.

The spelling of 289643664 in words is "two hundred eighty-nine million, six hundred forty-three thousand, six hundred sixty-four".