421868736 has 140 divisors (see below), whose sum is σ = 1324389528. Its totient is φ = 132323328.

The previous prime is 421868729. The next prime is 421868747. The reversal of 421868736 is 637868124.

It is a junction number, because it is equal to n+sod(n) for n = 421868691 and 421868700.

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 19 ways as a sum of consecutive naturals, for example, 85735 + ... + 90521.

Almost surely, 2^421868736 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 421868736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (662194764).

421868736 is an abundant number, since it is smaller than the sum of its proper divisors (902520792).

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

421868736 is a wasteful number, since it uses less digits than its factorization.

421868736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4828 (or 4809 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 421868736 is about 20539.4434199177. The cubic root of 421868736 is about 749.9962879816.

The spelling of 421868736 in words is "four hundred twenty-one million, eight hundred sixty-eight thousand, seven hundred thirty-six".