323345440 has 192 divisors, whose sum is σ = 899434368. Its totient is φ = 108544000.

The previous prime is 323345419. The next prime is 323345441. The reversal of 323345440 is 44543323.

It is a junction number, because it is equal to n+sod(n) for n = 323345399 and 323345408.

It is not an unprimeable number, because it can be changed into a prime (323345441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3021867 + ... + 3021973.

It is an arithmetic number, because the mean of its divisors is an integer number (4684554).

Almost surely, 2^323345440 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 323345440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (449717184).

323345440 is an abundant number, since it is smaller than the sum of its proper divisors (576088928).

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

323345440 is a wasteful number, since it uses less digits than its factorization.

323345440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251 (or 243 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 28.

The square root of 323345440 is about 17981.8085853454. The cubic root of 323345440 is about 686.3657126299.

Adding to 323345440 its reverse (44543323), we get a palindrome (367888763).

The spelling of 323345440 in words is "three hundred twenty-three million, three hundred forty-five thousand, four hundred forty".