321422420 has 96 divisors (see below), whose sum is σ = 767200896. Its totient is φ = 112089600.

The previous prime is 321422407. The next prime is 321422459. The reversal of 321422420 is 24224123.

321422420 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 321422392 and 321422401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 576782 + ... + 577338.

It is an arithmetic number, because the mean of its divisors is an integer number (7991676).

Almost surely, 2^321422420 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 321422420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (383600448).

321422420 is an abundant number, since it is smaller than the sum of its proper divisors (445778476).

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

321422420 is a wasteful number, since it uses less digits than its factorization.

321422420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681 (or 679 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 321422420 is about 17928.2575840487. The cubic root of 321422420 is about 685.0023407312.

Adding to 321422420 its reverse (24224123), we get a palindrome (345646543).

The spelling of 321422420 in words is "three hundred twenty-one million, four hundred twenty-two thousand, four hundred twenty".