9211279488 has 128 divisors (see below), whose sum is σ = 25346787840. Its totient is φ = 2960793600.

The previous prime is 9211279433. The next prime is 9211279513. The reversal of 9211279488 is 8849721129.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a self number, because there is not a number n which added to its sum of digits gives 9211279488.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3772348 + ... + 3774788.

It is an arithmetic number, because the mean of its divisors is an integer number (198021780).

Almost surely, 2^9211279488 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 9211279488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12673393920).

9211279488 is an abundant number, since it is smaller than the sum of its proper divisors (16135508352).

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

9211279488 is a wasteful number, since it uses less digits than its factorization.

9211279488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2806 (or 2794 counting only the distinct ones).

The product of its digits is 580608, while the sum is 51.

The square root of 9211279488 is about 95975.4108509049. The cubic root of 9211279488 is about 2096.2350900772.

The spelling of 9211279488 in words is "nine billion, two hundred eleven million, two hundred seventy-nine thousand, four hundred eighty-eight".