43440145 has 16 divisors (see below), whose sum is σ = 61498368. Its totient is φ = 28825920.

The previous prime is 43440119. The next prime is 43440149. The reversal of 43440145 is 54104434.

It is not a de Polignac number, because 43440145 - 2⁷ = 43440017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43440149) 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 15 ways as a sum of consecutive naturals, for example, 18934 + ... + 21103.

It is an arithmetic number, because the mean of its divisors is an integer number (3843648).

Almost surely, 2^43440145 is an apocalyptic number.

It is an amenable number.

43440145 is a deficient number, since it is larger than the sum of its proper divisors (18058223).

43440145 is a wasteful number, since it uses less digits than its factorization.

43440145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40080.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 43440145 is about 6590.9138213149. The cubic root of 43440145 is about 351.5311018346.

Adding to 43440145 its reverse (54104434), we get a palindrome (97544579).

The spelling of 43440145 in words is "forty-three million, four hundred forty thousand, one hundred forty-five".