989144856 has 48 divisors (see below), whose sum is σ = 3061640400. Its totient is φ = 282612672.

The previous prime is 989144839. The next prime is 989144861. The reversal of 989144856 is 658441989.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 980791 + ... + 981798.

It is an arithmetic number, because the mean of its divisors is an integer number (63784175).

Almost surely, 2^989144856 is an apocalyptic number.

It is an amenable number.

989144856 is an abundant number, since it is smaller than the sum of its proper divisors (2072495544).

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

989144856 is a wasteful number, since it uses less digits than its factorization.

989144856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1962608 (or 1962601 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 54.

The square root of 989144856 is about 31450.6733791186. The cubic root of 989144856 is about 996.3684464500.

The spelling of 989144856 in words is "nine hundred eighty-nine million, one hundred forty-four thousand, eight hundred fifty-six".