421551936 has 168 divisors, whose sum is σ = 1370197920. Its totient is φ = 122840064.

The previous prime is 421551929. The next prime is 421551953. The reversal of 421551936 is 639155124.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 421551936.

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 23 ways as a sum of consecutive naturals, for example, 140791 + ... + 143753.

It is an arithmetic number, because the mean of its divisors is an integer number (8155940).

Almost surely, 2^421551936 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 421551936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (685098960).

421551936 is an abundant number, since it is smaller than the sum of its proper divisors (948645984).

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

421551936 is a wasteful number, since it uses less digits than its factorization.

421551936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3013 (or 3000 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 421551936 is about 20531.7299806909. The cubic root of 421551936 is about 749.8085057774.

The spelling of 421551936 in words is "four hundred twenty-one million, five hundred fifty-one thousand, nine hundred thirty-six".