40043439 has 12 divisors (see below), whose sum is σ = 58372600. Its totient is φ = 26450064.

The previous prime is 40043417. The next prime is 40043467. The reversal of 40043439 is 93434004.

40043439 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40043439 - 2¹⁵ = 40010671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40043489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19429 + ... + 21390.

Almost surely, 2^40043439 is an apocalyptic number.

40043439 is a deficient number, since it is larger than the sum of its proper divisors (18329161).

40043439 is a wasteful number, since it uses less digits than its factorization.

40043439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40934 (or 40931 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 40043439 is about 6327.9885429732. The cubic root of 40043439 is about 342.1189439566.

The spelling of 40043439 in words is "forty million, forty-three thousand, four hundred thirty-nine".