989686812 has 24 divisors (see below), whose sum is σ = 2309795712. Its totient is φ = 329820400.

The previous prime is 989686793. The next prime is 989686813. The reversal of 989686812 is 218686989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989686813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77737 + ... + 89567.

It is an arithmetic number, because the mean of its divisors is an integer number (96241488).

Almost surely, 2^989686812 is an apocalyptic number.

It is an amenable number.

989686812 is an abundant number, since it is smaller than the sum of its proper divisors (1320108900).

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

989686812 is a wasteful number, since it uses less digits than its factorization.

989686812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18809 (or 18807 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 57.

The square root of 989686812 is about 31459.2881674077. The cubic root of 989686812 is about 996.5503845029.

The spelling of 989686812 in words is "nine hundred eighty-nine million, six hundred eighty-six thousand, eight hundred twelve".