421989184 has 28 divisors (see below), whose sum is σ = 838536804. Its totient is φ = 210704384.

The previous prime is 421989173. The next prime is 421989193. The reversal of 421989184 is 481989124.

It can be written as a sum of positive squares in 2 ways, for example, as 265038400 + 156950784 = 16280^2 + 12528^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46872 + ... + 55144.

It is an arithmetic number, because the mean of its divisors is an integer number (29947743).

Almost surely, 2^421989184 is an apocalyptic number.

It is an amenable number.

421989184 is a deficient number, since it is larger than the sum of its proper divisors (416547620).

421989184 is an equidigital number, since it uses as much as digits as its factorization.

421989184 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9082 (or 9072 counting only the distinct ones).

The product of its digits is 165888, while the sum is 46.

The square root of 421989184 is about 20542.3753251663. The cubic root of 421989184 is about 750.0676584888.

The spelling of 421989184 in words is "four hundred twenty-one million, nine hundred eighty-nine thousand, one hundred eighty-four".