40443423 has 4 divisors (see below), whose sum is σ = 53924568. Its totient is φ = 26962280.

The previous prime is 40443413. The next prime is 40443433. The reversal of 40443423 is 32434404.

It is a happy number.

40443423 is nontrivially palindromic in base 15.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (40443413) and next prime (40443433).

It is a cyclic number.

It is not a de Polignac number, because 40443423 - 2⁹ = 40442911 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40443393 and 40443402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40443413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6740568 + ... + 6740573.

It is an arithmetic number, because the mean of its divisors is an integer number (13481142).

Almost surely, 2^40443423 is an apocalyptic number.

40443423 is a deficient number, since it is larger than the sum of its proper divisors (13481145).

40443423 is a wasteful number, since it uses less digits than its factorization.

40443423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13481144.

The product of its (nonzero) digits is 4608, while the sum is 24.

The square root of 40443423 is about 6359.5143682517. The cubic root of 40443423 is about 343.2542859043.

Adding to 40443423 its reverse (32434404), we get a palindrome (72877827).

The spelling of 40443423 in words is "forty million, four hundred forty-three thousand, four hundred twenty-three".