320731547340 has 192 divisors, whose sum is σ = 925349483520. Its totient is φ = 82976762880.

The previous prime is 320731547329. The next prime is 320731547371. The reversal of 320731547340 is 43745137023.

It is a super-2 number, since 2×320731547340² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 75803025 + ... + 75807255.

It is an arithmetic number, because the mean of its divisors is an integer number (4819528560).

Almost surely, 2^320731547340 is an apocalyptic number.

320731547340 is a gapful number since it is divisible by the number (30) 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 320731547340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (462674741760).

320731547340 is an abundant number, since it is smaller than the sum of its proper divisors (604617936180).

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

320731547340 is a wasteful number, since it uses less digits than its factorization.

320731547340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4592 (or 4590 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 39.

The spelling of 320731547340 in words is "three hundred twenty billion, seven hundred thirty-one million, five hundred forty-seven thousand, three hundred forty".