9321207840 has 576 divisors, whose sum is σ = 39032098560. Its totient is φ = 2055352320.

The previous prime is 9321207829. The next prime is 9321207859. The reversal of 9321207840 is 487021239.

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 = 9321207795 and 9321207804.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 7892050 + ... + 7893230.

It is an arithmetic number, because the mean of its divisors is an integer number (67764060).

Almost surely, 2^9321207840 is an apocalyptic number.

9321207840 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 9321207840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19516049280).

9321207840 is an abundant number, since it is smaller than the sum of its proper divisors (29710890720).

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

9321207840 is a wasteful number, since it uses less digits than its factorization.

9321207840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1247 (or 1227 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 9321207840 is about 96546.4025223105. The cubic root of 9321207840 is about 2104.5410305609.

The spelling of 9321207840 in words is "nine billion, three hundred twenty-one million, two hundred seven thousand, eight hundred forty".