421044768 has 144 divisors (see below), whose sum is σ = 1238328000. Its totient is φ = 135636480.

The previous prime is 421044749. The next prime is 421044779. The reversal of 421044768 is 867440124.

It is a tau number, because it is divible by the number of its divisors (144).

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1206258 + ... + 1206606.

It is an arithmetic number, because the mean of its divisors is an integer number (8599500).

Almost surely, 2^421044768 is an apocalyptic number.

421044768 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421044768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (619164000).

421044768 is an abundant number, since it is smaller than the sum of its proper divisors (817283232).

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

421044768 is a wasteful number, since it uses less digits than its factorization.

421044768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495 (or 484 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The square root of 421044768 is about 20519.3754290914. The cubic root of 421044768 is about 749.5076875753.

The spelling of 421044768 in words is "four hundred twenty-one million, forty-four thousand, seven hundred sixty-eight".