320464572340 has 72 divisors (see below), whose sum is σ = 744429439656. Its totient is φ = 115790188800.

The previous prime is 320464572331. The next prime is 320464572391. The reversal of 320464572340 is 43275464023.

It can be written as a sum of positive squares in 4 ways, for example, as 44438326416 + 276026245924 = 210804^2 + 525382^2 .

It is a junction number, because it is equal to n+sod(n) for n = 320464572293 and 320464572302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41791 + ... + 801670.

It is an arithmetic number, because the mean of its divisors is an integer number (10339297773).

Almost surely, 2^320464572340 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 320464572340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (372214719828).

320464572340 is an abundant number, since it is smaller than the sum of its proper divisors (423964867316).

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

320464572340 is a wasteful number, since it uses less digits than its factorization.

320464572340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 843649 (or 843636 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 40.

The spelling of 320464572340 in words is "three hundred twenty billion, four hundred sixty-four million, five hundred seventy-two thousand, three hundred forty".