9740991988 has 72 divisors (see below), whose sum is σ = 21680002176. Its totient is φ = 3729136320.

The previous prime is 9740991979. The next prime is 9740992021. The reversal of 9740991988 is 8891990479.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 335881 + ... + 363727.

Almost surely, 2^9740991988 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 9740991988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10840001088).

9740991988 is an abundant number, since it is smaller than the sum of its proper divisors (11939010188).

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

9740991988 is a wasteful number, since it uses less digits than its factorization.

9740991988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27933 (or 27900 counting only the distinct ones).

The product of its (nonzero) digits is 11757312, while the sum is 64.

The square root of 9740991988 is about 98696.4639082880. The cubic root of 9740991988 is about 2135.6712208521.

The spelling of 9740991988 in words is "nine billion, seven hundred forty million, nine hundred ninety-one thousand, nine hundred eighty-eight".