421040304 has 60 divisors (see below), whose sum is σ = 1240353400. Its totient is φ = 132959232.

The previous prime is 421040303. The next prime is 421040311. The reversal of 421040304 is 403040124.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (421040303) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 74209 + ... + 79680.

Almost surely, 2^421040304 is an apocalyptic number.

It is an amenable number.

421040304 is an abundant number, since it is smaller than the sum of its proper divisors (819313096).

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

421040304 is a wasteful number, since it uses less digits than its factorization.

421040304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153922 (or 153913 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 421040304 is about 20519.2666535625. The cubic root of 421040304 is about 749.5050387563.

Adding to 421040304 its reverse (403040124), we get a palindrome (824080428).

The spelling of 421040304 in words is "four hundred twenty-one million, forty thousand, three hundred four".