40323443 has 4 divisors (see below), whose sum is σ = 40377888. Its totient is φ = 40269000.

The previous prime is 40323431. The next prime is 40323457. The reversal of 40323443 is 34432304.

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 40323443 - 2²² = 36129139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40323463) 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, 26096 + ... + 27597.

It is an arithmetic number, because the mean of its divisors is an integer number (10094472).

Almost surely, 2^40323443 is an apocalyptic number.

40323443 is a deficient number, since it is larger than the sum of its proper divisors (54445).

40323443 is an equidigital number, since it uses as much as digits as its factorization.

40323443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54444.

The product of its (nonzero) digits is 3456, while the sum is 23.

The square root of 40323443 is about 6350.0742515344. The cubic root of 40323443 is about 342.9145154403.

Adding to 40323443 its reverse (34432304), we get a palindrome (74755747).

The spelling of 40323443 in words is "forty million, three hundred twenty-three thousand, four hundred forty-three".