323565440 has 256 divisors, whose sum is σ = 925344000. Its totient is φ = 106905600.

The previous prime is 323565439. The next prime is 323565461. The reversal of 323565440 is 44565323.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 323565397 and 323565406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5484131 + ... + 5484189.

It is an arithmetic number, because the mean of its divisors is an integer number (3614625).

Almost surely, 2^323565440 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 323565440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (462672000).

323565440 is an abundant number, since it is smaller than the sum of its proper divisors (601778560).

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

323565440 is a wasteful number, since it uses less digits than its factorization.

323565440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149 (or 137 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 32.

The square root of 323565440 is about 17987.9248386244. The cubic root of 323565440 is about 686.5213420846.

The spelling of 323565440 in words is "three hundred twenty-three million, five hundred sixty-five thousand, four hundred forty".