989289664 has 28 divisors (see below), whose sum is σ = 2141588808. Its totient is φ = 449676800.

The previous prime is 989289661. The next prime is 989289667. The reversal of 989289664 is 466982989.

It is an interprime number because it is at equal distance from previous prime (989289661) and next prime (989289667).

It is not an unprimeable number, because it can be changed into a prime (989289661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 701917 + ... + 703324.

Almost surely, 2^989289664 is an apocalyptic number.

It is an amenable number.

989289664 is an abundant number, since it is smaller than the sum of its proper divisors (1152299144).

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

989289664 is a wasteful number, since it uses less digits than its factorization.

989289664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1405264 (or 1405254 counting only the distinct ones).

The product of its digits is 13436928, while the sum is 61.

The square root of 989289664 is about 31452.9754395351. The cubic root of 989289664 is about 996.4170659152.

The spelling of 989289664 in words is "nine hundred eighty-nine million, two hundred eighty-nine thousand, six hundred sixty-four".