320540 has 48 divisors (see below), whose sum is σ = 774144. Its totient is φ = 110400.

The previous prime is 320539. The next prime is 320561. The reversal of 320540 is 45023.

320540 = T₃₁ + T₃₂ + ... + T₁₂₄.

320540 is a modest number, since divided by 540 gives 320 as remainder.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 320540.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6797 + ... + 6843.

It is an arithmetic number, because the mean of its divisors is an integer number (16128).

2³²⁰⁵⁴⁰ 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 320540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (387072).

320540 is an abundant number, since it is smaller than the sum of its proper divisors (453604).

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

320540 is a wasteful number, since it uses less digits than its factorization.

320540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98 (or 96 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 14.

The square root of 320540 is about 566.1625208366. The cubic root of 320540 is about 68.4374907043.

Adding to 320540 its reverse (45023), we get a palindrome (365563).

The spelling of 320540 in words is "three hundred twenty thousand, five hundred forty".