321004340 has 12 divisors (see below), whose sum is σ = 674109156. Its totient is φ = 128401728.

The previous prime is 321004301. The next prime is 321004351. The reversal of 321004340 is 43400123.

It can be written as a sum of positive squares in 2 ways, for example, as 71301136 + 249703204 = 8444^2 + 15802^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8025089 + ... + 8025128.

It is an arithmetic number, because the mean of its divisors is an integer number (56175763).

Almost surely, 2^321004340 is an apocalyptic number.

It is an amenable number.

321004340 is an abundant number, since it is smaller than the sum of its proper divisors (353104816).

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

321004340 is a wasteful number, since it uses less digits than its factorization.

321004340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16050226 (or 16050224 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 321004340 is about 17916.5939843487. The cubic root of 321004340 is about 684.7052135245.

Adding to 321004340 its reverse (43400123), we get a palindrome (364404463).

The spelling of 321004340 in words is "three hundred twenty-one million, four thousand, three hundred forty".