420321220 has 24 divisors (see below), whose sum is σ = 962918208. Its totient is φ = 152844000.

The previous prime is 420321203. The next prime is 420321247. The reversal of 420321220 is 22123024.

It is a junction number, because it is equal to n+sod(n) for n = 420321194 and 420321203.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 955056 + ... + 955495.

It is an arithmetic number, because the mean of its divisors is an integer number (40121592).

Almost surely, 2^420321220 is an apocalyptic number.

It is an amenable number.

420321220 is an abundant number, since it is smaller than the sum of its proper divisors (542596988).

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

420321220 is a wasteful number, since it uses less digits than its factorization.

420321220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1910571 (or 1910569 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 420321220 is about 20501.7369995813. The cubic root of 420321220 is about 749.0781087679.

Adding to 420321220 its reverse (22123024), we get a palindrome (442444244).

The spelling of 420321220 in words is "four hundred twenty million, three hundred twenty-one thousand, two hundred twenty".