321434320 has 40 divisors (see below), whose sum is σ = 748657440. Its totient is φ = 128346240.

The previous prime is 321434299. The next prime is 321434339. The reversal of 321434320 is 23434123.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 321434291 and 321434300.

It is a congruent number.

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, 46275 + ... + 52765.

It is an arithmetic number, because the mean of its divisors is an integer number (18716436).

Almost surely, 2^321434320 is an apocalyptic number.

It is an amenable number.

321434320 is an abundant number, since it is smaller than the sum of its proper divisors (427223120).

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

321434320 is a wasteful number, since it uses less digits than its factorization.

321434320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7123 (or 7117 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 321434320 is about 17928.5894592966. The cubic root of 321434320 is about 685.0107942249.

Adding to 321434320 its reverse (23434123), we get a palindrome (344868443).

It can be divided in two parts, 32143 and 4320, that added together give a palindrome (36463).

The spelling of 321434320 in words is "three hundred twenty-one million, four hundred thirty-four thousand, three hundred twenty".