321404430120440 has 32 divisors (see below), whose sum is σ = 723168713573280. Its totient is φ = 128560217238912.

The previous prime is 321404430120413. The next prime is 321404430120443. The reversal of 321404430120440 is 44021034404123.

It is a super-2 number, since 2×321404430120440² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 321404430120397 and 321404430120406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321404430120443) 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, 45236132 + ... + 51856691.

It is an arithmetic number, because the mean of its divisors is an integer number (22599022299165).

Almost surely, 2^{321404430120440} is an apocalyptic number.

It is an amenable number.

321404430120440 is an abundant number, since it is smaller than the sum of its proper divisors (401764283452840).

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

321404430120440 is a wasteful number, since it uses less digits than its factorization.

321404430120440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97175591 (or 97175587 counting only the distinct ones).

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

Adding to 321404430120440 its reverse (44021034404123), we get a palindrome (365425464524563).

The spelling of 321404430120440 in words is "three hundred twenty-one trillion, four hundred four billion, four hundred thirty million, one hundred twenty thousand, four hundred forty".