323520540 has 144 divisors (see below), whose sum is σ = 1115910432. Its totient is φ = 69586944.

The previous prime is 323520539. The next prime is 323520559. The reversal of 323520540 is 45025323.

It is a self number, because there is not a number n which added to its sum of digits gives 323520540.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 46744 + ... + 53216.

It is an arithmetic number, because the mean of its divisors is an integer number (7749378).

Almost surely, 2^323520540 is an apocalyptic number.

323520540 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 323520540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (557955216).

323520540 is an abundant number, since it is smaller than the sum of its proper divisors (792389892).

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

323520540 is a wasteful number, since it uses less digits than its factorization.

323520540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6516 (or 6507 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 24.

The square root of 323520540 is about 17986.6767358509. The cubic root of 323520540 is about 686.4895852585.

Adding to 323520540 its reverse (45025323), we get a palindrome (368545863).

The spelling of 323520540 in words is "three hundred twenty-three million, five hundred twenty thousand, five hundred forty".