989661792 has 192 divisors, whose sum is σ = 3110897664. Its totient is φ = 269568000.

The previous prime is 989661787. The next prime is 989661793. The reversal of 989661792 is 297166989.

989661792 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989661793) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1317417 + ... + 1318167.

It is an arithmetic number, because the mean of its divisors is an integer number (16202592).

Almost surely, 2^989661792 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 989661792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1555448832).

989661792 is an abundant number, since it is smaller than the sum of its proper divisors (2121235872).

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

989661792 is a wasteful number, since it uses less digits than its factorization.

989661792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861 (or 853 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 57.

The square root of 989661792 is about 31458.8905080901. The cubic root of 989661792 is about 996.5419865934.

The spelling of 989661792 in words is "nine hundred eighty-nine million, six hundred sixty-one thousand, seven hundred ninety-two".