321322340 has 24 divisors (see below), whose sum is σ = 675903480. Its totient is φ = 128314368.

The previous prime is 321322333. The next prime is 321322343. The reversal of 321322340 is 43223123.

It can be written as a sum of positive squares in 4 ways, for example, as 3912484 + 317409856 = 1978^2 + 17816^2 .

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

It is not an unprimeable number, because it can be changed into a prime (321322343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 845 + ... + 25364.

It is an arithmetic number, because the mean of its divisors is an integer number (28162645).

Almost surely, 2^321322340 is an apocalyptic number.

It is an amenable number.

321322340 is an abundant number, since it is smaller than the sum of its proper divisors (354581140).

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

321322340 is a wasteful number, since it uses less digits than its factorization.

321322340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26831 (or 26829 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 321322340 is about 17925.4662421930. The cubic root of 321322340 is about 684.9312378808.

Adding to 321322340 its reverse (43223123), we get a palindrome (364545463).

The spelling of 321322340 in words is "three hundred twenty-one million, three hundred twenty-two thousand, three hundred forty".