989894944 has 12 divisors (see below), whose sum is σ = 1948855734. Its totient is φ = 494947456.

The previous prime is 989894911. The next prime is 989894947. The reversal of 989894944 is 449498989.

It can be written as a sum of positive squares in only one way, i.e., 782880400 + 207014544 = 27980^2 + 14388^2 .

It is not an unprimeable number, because it can be changed into a prime (989894947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15467077 + ... + 15467140.

Almost surely, 2^989894944 is an apocalyptic number.

It is an amenable number.

989894944 is a deficient number, since it is larger than the sum of its proper divisors (958960790).

989894944 is a wasteful number, since it uses less digits than its factorization.

989894944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30934227 (or 30934219 counting only the distinct ones).

The product of its digits is 26873856, while the sum is 64.

The square root of 989894944 is about 31462.5959513833. The cubic root of 989894944 is about 996.6202380781.

The spelling of 989894944 in words is "nine hundred eighty-nine million, eight hundred ninety-four thousand, nine hundred forty-four".