989547864 has 16 divisors (see below), whose sum is σ = 2473869720. Its totient is φ = 329849280.

The previous prime is 989547859. The next prime is 989547887. The reversal of 989547864 is 468745989.

It is a junction number, because it is equal to n+sod(n) for n = 989547798 and 989547807.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20615557 + ... + 20615604.

Almost surely, 2^989547864 is an apocalyptic number.

It is an amenable number.

989547864 is an abundant number, since it is smaller than the sum of its proper divisors (1484321856).

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

989547864 is a wasteful number, since it uses less digits than its factorization.

989547864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41231170 (or 41231166 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 60.

The square root of 989547864 is about 31457.0797118868. The cubic root of 989547864 is about 996.5037451143.

The spelling of 989547864 in words is "nine hundred eighty-nine million, five hundred forty-seven thousand, eight hundred sixty-four".