420043220 has 24 divisors (see below), whose sum is σ = 883744008. Its totient is φ = 167702400.

The previous prime is 420043219. The next prime is 420043223. The reversal of 420043220 is 22340024.

It can be written as a sum of positive squares in 4 ways, for example, as 43217476 + 376825744 = 6574^2 + 19412^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420043223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8591 + ... + 30230.

It is an arithmetic number, because the mean of its divisors is an integer number (36822667).

Almost surely, 2^420043220 is an apocalyptic number.

It is an amenable number.

420043220 is an abundant number, since it is smaller than the sum of its proper divisors (463700788).

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

420043220 is a wasteful number, since it uses less digits than its factorization.

420043220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39371 (or 39369 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 420043220 is about 20494.9559648222. The cubic root of 420043220 is about 748.9129258618.

Adding to 420043220 its reverse (22340024), we get a palindrome (442383244).

The spelling of 420043220 in words is "four hundred twenty million, forty-three thousand, two hundred twenty".