421386988 has 24 divisors (see below), whose sum is σ = 815802624. Its totient is φ = 188840400.

The previous prime is 421386961. The next prime is 421386989. The reversal of 421386988 is 889683124.

It is not an unprimeable number, because it can be changed into a prime (421386989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64320 + ... + 70567.

It is an arithmetic number, because the mean of its divisors is an integer number (33991776).

Almost surely, 2^421386988 is an apocalyptic number.

It is an amenable number.

421386988 is a deficient number, since it is larger than the sum of its proper divisors (394415636).

421386988 is a wasteful number, since it uses less digits than its factorization.

421386988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134973 (or 134971 counting only the distinct ones).

The product of its digits is 663552, while the sum is 49.

The square root of 421386988 is about 20527.7126831023. The cubic root of 421386988 is about 749.7106961224.

The spelling of 421386988 in words is "four hundred twenty-one million, three hundred eighty-six thousand, nine hundred eighty-eight".