421144432 has 10 divisors (see below), whose sum is σ = 815967368. Its totient is φ = 210572208.

The previous prime is 421144411. The next prime is 421144463. The reversal of 421144432 is 234441124.

It is a junction number, because it is equal to n+sod(n) for n = 421144397 and 421144406.

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 as a sum of consecutive naturals, namely, 13160748 + ... + 13160779.

Almost surely, 2^421144432 is an apocalyptic number.

It is an amenable number.

421144432 is a deficient number, since it is larger than the sum of its proper divisors (394822936).

421144432 is a wasteful number, since it uses less digits than its factorization.

421144432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26321535 (or 26321529 counting only the distinct ones).

The product of its digits is 3072, while the sum is 25.

The square root of 421144432 is about 20521.8038193527. The cubic root of 421144432 is about 749.5668206705.

Adding to 421144432 its reverse (234441124), we get a palindrome (655585556).

The spelling of 421144432 in words is "four hundred twenty-one million, one hundred forty-four thousand, four hundred thirty-two".