43981344 has 72 divisors (see below), whose sum is σ = 136451952. Its totient is φ = 13326720.

The previous prime is 43981339. The next prime is 43981349. The reversal of 43981344 is 44318934.

It is an interprime number because it is at equal distance from previous prime (43981339) and next prime (43981349).

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 43981299 and 43981308.

It is not an unprimeable number, because it can be changed into a prime (43981349) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 3774 + ... + 10109.

It is an arithmetic number, because the mean of its divisors is an integer number (1895166).

Almost surely, 2^43981344 is an apocalyptic number.

43981344 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

43981344 is an abundant number, since it is smaller than the sum of its proper divisors (92470608).

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

43981344 is a wasteful number, since it uses less digits than its factorization.

43981344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13910 (or 13899 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 43981344 is about 6631.8431827057. The cubic root of 43981344 is about 352.9849308892.

The spelling of 43981344 in words is "forty-three million, nine hundred eighty-one thousand, three hundred forty-four".