40243443 has 4 divisors (see below), whose sum is σ = 53657928. Its totient is φ = 26828960.

The previous prime is 40243417. The next prime is 40243459. The reversal of 40243443 is 34434204.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 40243443 - 2⁸ = 40243187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40243243) 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, 6707238 + ... + 6707243.

It is an arithmetic number, because the mean of its divisors is an integer number (13414482).

Almost surely, 2^40243443 is an apocalyptic number.

40243443 is a deficient number, since it is larger than the sum of its proper divisors (13414485).

40243443 is a wasteful number, since it uses less digits than its factorization.

40243443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13414484.

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

The square root of 40243443 is about 6343.7719851836. The cubic root of 40243443 is about 342.6875893538.

Adding to 40243443 its reverse (34434204), we get a palindrome (74677647).

The spelling of 40243443 in words is "forty million, two hundred forty-three thousand, four hundred forty-three".