321440410420340 has 96 divisors (see below), whose sum is σ = 701341427404800. Its totient is φ = 123602450048000.

The previous prime is 321440410420249. The next prime is 321440410420397. The reversal of 321440410420340 is 43024014044123.

It is a junction number, because it is equal to n+sod(n) for n = 321440410420297 and 321440410420306.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 396883277 + ... + 397692363.

It is an arithmetic number, because the mean of its divisors is an integer number (7305639868800).

Almost surely, 2^{321440410420340} 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 321440410420340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (350670713702400).

321440410420340 is an abundant number, since it is smaller than the sum of its proper divisors (379901016984460).

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

321440410420340 is a wasteful number, since it uses less digits than its factorization.

321440410420340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812105 (or 812103 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 32.

Adding to 321440410420340 its reverse (43024014044123), we get a palindrome (364464424464463).

The spelling of 321440410420340 in words is "three hundred twenty-one trillion, four hundred forty billion, four hundred ten million, four hundred twenty thousand, three hundred forty".