323840 has 72 divisors (see below), whose sum is σ = 883008. Its totient is φ = 112640.

The previous prime is 323837. The next prime is 323879. The reversal of 323840 is 48323.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 323840.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14069 + ... + 14091.

It is an arithmetic number, because the mean of its divisors is an integer number (12264).

2³²³⁸⁴⁰ 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 323840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (441504).

323840 is an abundant number, since it is smaller than the sum of its proper divisors (559168).

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

323840 is a wasteful number, since it uses less digits than its factorization.

323840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55 (or 41 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 323840 is about 569.0694158009. The cubic root of 323840 is about 68.6715468720.

The spelling of 323840 in words is "three hundred twenty-three thousand, eight hundred forty".