7321864320 has 512 divisors, whose sum is σ = 28274400000. Its totient is φ = 1783627776.

The previous prime is 7321864307. The next prime is 7321864327. The reversal of 7321864320 is 234681237.

It is a happy number.

7321864320 is a `hidden beast` number, since 7 + 3 + 2 + 1 + 8 + 643 + 2 + 0 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (7321864327) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 9520896 + ... + 9521664.

Almost surely, 2^7321864320 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 7321864320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14137200000).

7321864320 is an abundant number, since it is smaller than the sum of its proper divisors (20952535680).

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

7321864320 is a wasteful number, since it uses less digits than its factorization.

7321864320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 845 (or 827 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 7321864320 is about 85567.8930440618. The cubic root of 7321864320 is about 1941.8122011499.

The spelling of 7321864320 in words is "seven billion, three hundred twenty-one million, eight hundred sixty-four thousand, three hundred twenty".