43421432 has 8 divisors (see below), whose sum is σ = 81415200. Its totient is φ = 21710712.

The previous prime is 43421429. The next prime is 43421437. The reversal of 43421432 is 23412434.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 43421398 and 43421407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43421437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2713832 + ... + 2713847.

It is an arithmetic number, because the mean of its divisors is an integer number (10176900).

Almost surely, 2^43421432 is an apocalyptic number.

It is an amenable number.

43421432 is a deficient number, since it is larger than the sum of its proper divisors (37993768).

43421432 is a wasteful number, since it uses less digits than its factorization.

43421432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5427685 (or 5427681 counting only the distinct ones).

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

The square root of 43421432 is about 6589.4940625210. The cubic root of 43421432 is about 351.4806174550.

Adding to 43421432 its reverse (23412434), we get a palindrome (66833866).

The spelling of 43421432 in words is "forty-three million, four hundred twenty-one thousand, four hundred thirty-two".