421443320 has 32 divisors (see below), whose sum is σ = 973879200. Its totient is φ = 164020608.

The previous prime is 421443299. The next prime is 421443353. The reversal of 421443320 is 23344124.

It is a super-2 number, since 2×421443320² = 355228943945244800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140900 + ... + 143859.

It is an arithmetic number, because the mean of its divisors is an integer number (30433725).

Almost surely, 2^421443320 is an apocalyptic number.

421443320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

421443320 is an abundant number, since it is smaller than the sum of its proper divisors (552435880).

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

421443320 is a wasteful number, since it uses less digits than its factorization.

421443320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284807 (or 284803 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 421443320 is about 20529.0847336164. The cubic root of 421443320 is about 749.7441023281.

Adding to 421443320 its reverse (23344124), we get a palindrome (444787444).

The spelling of 421443320 in words is "four hundred twenty-one million, four hundred forty-three thousand, three hundred twenty".