9491324040 has 320 divisors, whose sum is σ = 34973104320. Its totient is φ = 2289600000.

The previous prime is 9491324023. The next prime is 9491324071. The reversal of 9491324040 is 404231949.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 9491323986 and 9491324004.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 8945110 + ... + 8946170.

It is an arithmetic number, because the mean of its divisors is an integer number (109290951).

Almost surely, 2^9491324040 is an apocalyptic number.

9491324040 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 9491324040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17486552160).

9491324040 is an abundant number, since it is smaller than the sum of its proper divisors (25481780280).

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

9491324040 is a wasteful number, since it uses less digits than its factorization.

9491324040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1346 (or 1333 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 9491324040 is about 97423.4265461855. The cubic root of 9491324040 is about 2117.2668617935.

Adding to 9491324040 its reverse (404231949), we get a palindrome (9895555989).

The spelling of 9491324040 in words is "nine billion, four hundred ninety-one million, three hundred twenty-four thousand, forty".