40344423 has 32 divisors (see below), whose sum is σ = 65679360. Its totient is φ = 21530880.

The previous prime is 40344419. The next prime is 40344427. The reversal of 40344423 is 32444304.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (40344419) and next prime (40344427).

It is not a de Polignac number, because 40344423 - 2² = 40344419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40344393 and 40344402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40344427) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17811 + ... + 19947.

It is an arithmetic number, because the mean of its divisors is an integer number (2052480).

Almost surely, 2^40344423 is an apocalyptic number.

40344423 is a deficient number, since it is larger than the sum of its proper divisors (25334937).

40344423 is a wasteful number, since it uses less digits than its factorization.

40344423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2207.

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

The square root of 40344423 is about 6351.7259859034. The cubic root of 40344423 is about 342.9739771217.

Adding to 40344423 its reverse (32444304), we get a palindrome (72788727).

The spelling of 40344423 in words is "forty million, three hundred forty-four thousand, four hundred twenty-three".