420544220 has 24 divisors (see below), whose sum is σ = 907013184. Its totient is φ = 163670976.

The previous prime is 420544217. The next prime is 420544231. The reversal of 420544220 is 22445024.

It is a congruent number.

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, 283412 + ... + 284891.

It is an arithmetic number, because the mean of its divisors is an integer number (37792216).

Almost surely, 2^420544220 is an apocalyptic number.

It is an amenable number.

420544220 is an abundant number, since it is smaller than the sum of its proper divisors (486468964).

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

420544220 is a wasteful number, since it uses less digits than its factorization.

420544220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568349 (or 568347 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 23.

The square root of 420544220 is about 20507.1748419913. The cubic root of 420544220 is about 749.2105589650.

Adding to 420544220 its reverse (22445024), we get a palindrome (442989244).

The spelling of 420544220 in words is "four hundred twenty million, five hundred forty-four thousand, two hundred twenty".