40423423 has 4 divisors (see below), whose sum is σ = 40801320. Its totient is φ = 40045528.

The previous prime is 40423421. The next prime is 40423429. The reversal of 40423423 is 32432404.

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 40423423 - 2¹ = 40423421 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 40423394 and 40423403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40423421) 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, 188788 + ... + 189001.

It is an arithmetic number, because the mean of its divisors is an integer number (10200330).

Almost surely, 2^40423423 is an apocalyptic number.

40423423 is a deficient number, since it is larger than the sum of its proper divisors (377897).

40423423 is a wasteful number, since it uses less digits than its factorization.

40423423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377896.

The product of its (nonzero) digits is 2304, while the sum is 22.

The square root of 40423423 is about 6357.9417266911. The cubic root of 40423423 is about 343.1976947690.

Adding to 40423423 its reverse (32432404), we get a palindrome (72855827).

The spelling of 40423423 in words is "forty million, four hundred twenty-three thousand, four hundred twenty-three".