989854644 has 24 divisors (see below), whose sum is σ = 2318869728. Its totient is φ = 328636000.

The previous prime is 989854643. The next prime is 989854667. The reversal of 989854644 is 446458989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989854643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161307 + ... + 167330.

It is an arithmetic number, because the mean of its divisors is an integer number (96619572).

Almost surely, 2^989854644 is an apocalyptic number.

It is an amenable number.

989854644 is an abundant number, since it is smaller than the sum of its proper divisors (1329015084).

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

989854644 is a wasteful number, since it uses less digits than its factorization.

989854644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328895 (or 328893 counting only the distinct ones).

The product of its digits is 9953280, while the sum is 57.

The square root of 989854644 is about 31461.9555018438. The cubic root of 989854644 is about 996.6067132959.

The spelling of 989854644 in words is "nine hundred eighty-nine million, eight hundred fifty-four thousand, six hundred forty-four".