40443 has 16 divisors (see below), whose sum is σ = 62496. Its totient is φ = 23040.

The previous prime is 40433. The next prime is 40459. The reversal of 40443 is 34404.

It is not a de Polignac number, because 40443 - 2⁴ = 40427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 633 + ... + 693.

It is an arithmetic number, because the mean of its divisors is an integer number (3906).

2⁴⁰⁴⁴³ is an apocalyptic number.

40443 is a deficient number, since it is larger than the sum of its proper divisors (22053).

40443 is a wasteful number, since it uses less digits than its factorization.

40443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94.

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 40443 is about 201.1044504729. The cubic root of 40443 is about 34.3253089195.

Adding to 40443 its reverse (34404), we get a palindrome (74847).

The spelling of 40443 in words is "forty thousand, four hundred forty-three", and thus it is an iban number.