43221984 has 96 divisors (see below), whose sum is σ = 124467840. Its totient is φ = 13051392.

The previous prime is 43221961. The next prime is 43222033. The reversal of 43221984 is 48912234.

It is a tau number, because it is divible by the number of its divisors (96).

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 15 ways as a sum of consecutive naturals, for example, 73339 + ... + 73925.

It is an arithmetic number, because the mean of its divisors is an integer number (1296540).

Almost surely, 2^43221984 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 43221984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62233920).

43221984 is an abundant number, since it is smaller than the sum of its proper divisors (81245856).

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

43221984 is a wasteful number, since it uses less digits than its factorization.

43221984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672 (or 664 counting only the distinct ones).

The product of its digits is 13824, while the sum is 33.

The square root of 43221984 is about 6574.3428568945. The cubic root of 43221984 is about 350.9416384976.

The spelling of 43221984 in words is "forty-three million, two hundred twenty-one thousand, nine hundred eighty-four".