43421812 has 12 divisors (see below), whose sum is σ = 86843680. Its totient is φ = 18609336.

The previous prime is 43421803. The next prime is 43421839. The reversal of 43421812 is 21812434.

43421812 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 775362 + ... + 775417.

Almost surely, 2^43421812 is an apocalyptic number.

It is an amenable number.

43421812 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

43421812 is a wasteful number, since it uses less digits than its factorization.

43421812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1550790 (or 1550788 counting only the distinct ones).

The product of its digits is 1536, while the sum is 25.

The square root of 43421812 is about 6589.5228962346. The cubic root of 43421812 is about 351.4816427723.

The spelling of 43421812 in words is "forty-three million, four hundred twenty-one thousand, eight hundred twelve".