421604088 has 64 divisors (see below), whose sum is σ = 1108944000. Its totient is φ = 133375872.

The previous prime is 421604083. The next prime is 421604111. The reversal of 421604088 is 880406124.

It is a Cunningham number, because it is equal to 20533²-1.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421604081) 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 15 ways as a sum of consecutive naturals, for example, 35931 + ... + 46197.

It is an arithmetic number, because the mean of its divisors is an integer number (17327250).

Almost surely, 2^421604088 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 421604088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (554472000).

421604088 is an abundant number, since it is smaller than the sum of its proper divisors (687339912).

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

421604088 is a wasteful number, since it uses less digits than its factorization.

421604088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10364 (or 10360 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 421604088 is about 20532.9999756490. Note that the first 4 decimals coincide. The cubic root of 421604088 is about 749.8394251790.

The spelling of 421604088 in words is "four hundred twenty-one million, six hundred four thousand, eighty-eight".