989311968 has 120 divisors (see below), whose sum is σ = 2939123880. Its totient is φ = 326419200.

The previous prime is 989311963. The next prime is 989311979. The reversal of 989311968 is 869113989.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989311963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 259903 + ... + 263681.

It is an arithmetic number, because the mean of its divisors is an integer number (24492699).

Almost surely, 2^989311968 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 989311968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1469561940).

989311968 is an abundant number, since it is smaller than the sum of its proper divisors (1949811912).

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

989311968 is a wasteful number, since it uses less digits than its factorization.

989311968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3902 (or 3885 counting only the distinct ones).

The product of its digits is 839808, while the sum is 54.

The square root of 989311968 is about 31453.3299985868. The cubic root of 989311968 is about 996.4245540891.

The spelling of 989311968 in words is "nine hundred eighty-nine million, three hundred eleven thousand, nine hundred sixty-eight".