421885220 has 24 divisors (see below), whose sum is σ = 886738104. Its totient is φ = 168605696.

The previous prime is 421885183. The next prime is 421885229. The reversal of 421885220 is 22588124.

It can be written as a sum of positive squares in 4 ways, for example, as 732736 + 421152484 = 856^2 + 20522^2 .

It is not an unprimeable number, because it can be changed into a prime (421885229) 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, 15674 + ... + 33006.

It is an arithmetic number, because the mean of its divisors is an integer number (36947421).

Almost surely, 2^421885220 is an apocalyptic number.

It is an amenable number.

421885220 is an abundant number, since it is smaller than the sum of its proper divisors (464852884).

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

421885220 is a wasteful number, since it uses less digits than its factorization.

421885220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18559 (or 18557 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 32.

The square root of 421885220 is about 20539.8446926942. The cubic root of 421885220 is about 750.0060562474.

The spelling of 421885220 in words is "four hundred twenty-one million, eight hundred eighty-five thousand, two hundred twenty".