421810944 has 144 divisors (see below), whose sum is σ = 1195985280. Its totient is φ = 131604480.

The previous prime is 421810937. The next prime is 421810979. The reversal of 421810944 is 449018124.

It is a super-2 number, since 2×421810944² = 355848944956342272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1998999 + ... + 1999209.

Almost surely, 2^421810944 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 421810944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (597992640).

421810944 is an abundant number, since it is smaller than the sum of its proper divisors (774174336).

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

421810944 is a wasteful number, since it uses less digits than its factorization.

421810944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386 (or 372 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 421810944 is about 20538.0365176421. The cubic root of 421810944 is about 749.9620389675.

The spelling of 421810944 in words is "four hundred twenty-one million, eight hundred ten thousand, nine hundred forty-four".