43421872 has 20 divisors (see below), whose sum is σ = 90601840. Its totient is φ = 20040768.

The previous prime is 43421867. The next prime is 43421879. The reversal of 43421872 is 27812434.

It is not an unprimeable number, because it can be changed into a prime (43421879) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104172 + ... + 104587.

It is an arithmetic number, because the mean of its divisors is an integer number (4530092).

Almost surely, 2^43421872 is an apocalyptic number.

It is an amenable number.

43421872 is an abundant number, since it is smaller than the sum of its proper divisors (47179968).

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

43421872 is a wasteful number, since it uses less digits than its factorization.

43421872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208780 (or 208774 counting only the distinct ones).

The product of its digits is 10752, while the sum is 31.

The square root of 43421872 is about 6589.5274489147. The cubic root of 43421872 is about 351.4818046640.

The spelling of 43421872 in words is "forty-three million, four hundred twenty-one thousand, eight hundred seventy-two".