989749668 has 48 divisors (see below), whose sum is σ = 2327351040. Its totient is φ = 327366144.

The previous prime is 989749637. The next prime is 989749669. The reversal of 989749668 is 866947989.

It is a super-2 number, since 2×989749668² = 1959208810612220448, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 989749599 and 989749608.

It is not an unprimeable number, because it can be changed into a prime (989749669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1241446 + ... + 1242242.

It is an arithmetic number, because the mean of its divisors is an integer number (48486480).

Almost surely, 2^989749668 is an apocalyptic number.

It is an amenable number.

989749668 is an abundant number, since it is smaller than the sum of its proper divisors (1337601372).

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

989749668 is a wasteful number, since it uses less digits than its factorization.

989749668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1476 (or 1474 counting only the distinct ones).

The product of its digits is 47029248, while the sum is 66.

The square root of 989749668 is about 31460.2871569857. The cubic root of 989749668 is about 996.5714813604.

The spelling of 989749668 in words is "nine hundred eighty-nine million, seven hundred forty-nine thousand, six hundred sixty-eight".