421004304 has 240 divisors, whose sum is σ = 1444352000. Its totient is φ = 116173440.

The previous prime is 421004279. The next prime is 421004317. The reversal of 421004304 is 403400124.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 843447 + ... + 843945.

Almost surely, 2^421004304 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421004304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (722176000).

421004304 is an abundant number, since it is smaller than the sum of its proper divisors (1023347696).

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

421004304 is a wasteful number, since it uses less digits than its factorization.

421004304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560 (or 542 counting only the distinct ones).

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

The square root of 421004304 is about 20518.3894104776. The cubic root of 421004304 is about 749.4836766285.

Adding to 421004304 its reverse (403400124), we get a palindrome (824404428).

The spelling of 421004304 in words is "four hundred twenty-one million, four thousand, three hundred four".