421189440 has 224 divisors, whose sum is σ = 1540581120. Its totient is φ = 95502336.

The previous prime is 421189387. The next prime is 421189459. The reversal of 421189440 is 44981124.

It is a tau number, because it is divible by the number of its divisors (224).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1565626 + ... + 1565894.

Almost surely, 2^421189440 is an apocalyptic number.

421189440 is a gapful number since it is divisible by the number (40) 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 421189440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (770290560).

421189440 is an abundant number, since it is smaller than the sum of its proper divisors (1119391680).

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

421189440 is a wasteful number, since it uses less digits than its factorization.

421189440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529 (or 519 counting only the distinct ones).

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

The square root of 421189440 is about 20522.9003798196. The cubic root of 421189440 is about 749.5935219628.

The spelling of 421189440 in words is "four hundred twenty-one million, one hundred eighty-nine thousand, four hundred forty".