9120331440 has 480 divisors, whose sum is σ = 34889766912. Its totient is φ = 2132697600.

The previous prime is 9120331439. The next prime is 9120331453. The reversal of 9120331440 is 441330219.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 29707767 + ... + 29708073.

Almost surely, 2^9120331440 is an apocalyptic number.

9120331440 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9120331440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17444883456).

9120331440 is an abundant number, since it is smaller than the sum of its proper divisors (25769435472).

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

9120331440 is a wasteful number, since it uses less digits than its factorization.

9120331440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390 (or 359 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 9120331440 is about 95500.4263864827. The cubic root of 9120331440 is about 2089.3131630444.

Adding to 9120331440 its reverse (441330219), we get a palindrome (9561661659).

The spelling of 9120331440 in words is "nine billion, one hundred twenty million, three hundred thirty-one thousand, four hundred forty".