421440032232 has 144 divisors (see below), whose sum is σ = 1205245585440. Its totient is φ = 133018946496.

The previous prime is 421440032179. The next prime is 421440032239. The reversal of 421440032232 is 232230044124.

421440032232 is a `hidden beast` number, since 4 + 21 + 4 + 400 + 3 + 2 + 232 = 666.

It is a super-2 number, since 2×421440032232² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 421440032196 and 421440032205.

It is not an unprimeable number, because it can be changed into a prime (421440032239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 85953093 + ... + 85957995.

It is an arithmetic number, because the mean of its divisors is an integer number (8369761010).

Almost surely, 2^421440032232 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 421440032232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (602622792720).

421440032232 is an abundant number, since it is smaller than the sum of its proper divisors (783805553208).

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

421440032232 is a wasteful number, since it uses less digits than its factorization.

421440032232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8260 (or 8234 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 421440032232 its reverse (232230044124), we get a palindrome (653670076356).

The spelling of 421440032232 in words is "four hundred twenty-one billion, four hundred forty million, thirty-two thousand, two hundred thirty-two".