421441440 has 96 divisors (see below), whose sum is σ = 1517201280. Its totient is φ = 96328704.

The previous prime is 421441439. The next prime is 421441459. The reversal of 421441440 is 44144124.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×421441440² = 355225774698547200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 421441440.

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, 59355 + ... + 66074.

It is an arithmetic number, because the mean of its divisors is an integer number (15804180).

Almost surely, 2^421441440 is an apocalyptic number.

421441440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

421441440 is an abundant number, since it is smaller than the sum of its proper divisors (1095759840).

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

421441440 is a wasteful number, since it uses less digits than its factorization.

421441440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125454 (or 125446 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 24.

The square root of 421441440 is about 20529.0389448703. The cubic root of 421441440 is about 749.7429874917.

Adding to 421441440 its reverse (44144124), we get a palindrome (465585564).

It can be divided in two parts, 4214 and 41440, that added together give a palindrome (45654).

The spelling of 421441440 in words is "four hundred twenty-one million, four hundred forty-one thousand, four hundred forty".