421363644 has 72 divisors (see below), whose sum is σ = 1071674352. Its totient is φ = 128793600.

The previous prime is 421363571. The next prime is 421363651. The reversal of 421363644 is 446363124.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 350244 + ... + 351444.

It is an arithmetic number, because the mean of its divisors is an integer number (14884366).

Almost surely, 2^421363644 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 421363644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (535837176).

421363644 is an abundant number, since it is smaller than the sum of its proper divisors (650310708).

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

421363644 is a wasteful number, since it uses less digits than its factorization.

421363644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1407 (or 1392 counting only the distinct ones).

The product of its digits is 41472, while the sum is 33.

The square root of 421363644 is about 20527.1440780251. The cubic root of 421363644 is about 749.6968517069.

The spelling of 421363644 in words is "four hundred twenty-one million, three hundred sixty-three thousand, six hundred forty-four".