421023444440 has 64 divisors (see below), whose sum is σ = 949519584000. Its totient is φ = 168015620608.

The previous prime is 421023444421. The next prime is 421023444503. The reversal of 421023444440 is 44444320124.

It is a junction number, because it is equal to n+sod(n) for n = 421023444397 and 421023444406.

It is a congruent number.

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, 53445782 + ... + 53453658.

It is an arithmetic number, because the mean of its divisors is an integer number (14836243500).

Almost surely, 2^421023444440 is an apocalyptic number.

421023444440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

421023444440 is an abundant number, since it is smaller than the sum of its proper divisors (528496139560).

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

421023444440 is a wasteful number, since it uses less digits than its factorization.

421023444440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10844 (or 10840 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 32.

Adding to 421023444440 its reverse (44444320124), we get a palindrome (465467764564).

The spelling of 421023444440 in words is "four hundred twenty-one billion, twenty-three million, four hundred forty-four thousand, four hundred forty".