420400224220 has 48 divisors (see below), whose sum is σ = 886430780928. Its totient is φ = 167476562240.

The previous prime is 420400224217. The next prime is 420400224221. The reversal of 420400224220 is 22422004024.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 420400224191 and 420400224200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420400224221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26118375 + ... + 26134465.

It is an arithmetic number, because the mean of its divisors is an integer number (18467307936).

Almost surely, 2^420400224220 is an apocalyptic number.

It is an amenable number.

420400224220 is an abundant number, since it is smaller than the sum of its proper divisors (466030556708).

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

420400224220 is a wasteful number, since it uses less digits than its factorization.

420400224220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21330 (or 21328 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 22.

Adding to 420400224220 its reverse (22422004024), we get a palindrome (442822228244).

The spelling of 420400224220 in words is "four hundred twenty billion, four hundred million, two hundred twenty-four thousand, two hundred twenty".