321438 has 24 divisors (see below), whose sum is σ = 698328. Its totient is φ = 98592.

The previous prime is 321427. The next prime is 321443. The reversal of 321438 is 834123.

It is a happy number.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 856 + ... + 1172.

It is an arithmetic number, because the mean of its divisors is an integer number (29097).

2³²¹⁴³⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 321438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (349164).

321438 is an abundant number, since it is smaller than the sum of its proper divisors (376890).

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

321438 is a wasteful number, since it uses less digits than its factorization.

321438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348 (or 335 counting only the distinct ones).

The product of its digits is 576, while the sum is 21.

The square root of 321438 is about 566.9550246713. The cubic root of 321438 is about 68.5013408372.

The spelling of 321438 in words is "three hundred twenty-one thousand, four hundred thirty-eight".