40540423 has 8 divisors (see below), whose sum is σ = 50544000. Its totient is φ = 31589880.

The previous prime is 40540391. The next prime is 40540441. The reversal of 40540423 is 32404504.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40540423 - 2⁵ = 40540391 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40540394 and 40540403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40540453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 263173 + ... + 263326.

It is an arithmetic number, because the mean of its divisors is an integer number (6318000).

Almost surely, 2^40540423 is an apocalyptic number.

40540423 is a deficient number, since it is larger than the sum of its proper divisors (10003577).

40540423 is a wasteful number, since it uses less digits than its factorization.

40540423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526517.

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 40540423 is about 6367.1361694250. The cubic root of 40540423 is about 343.5284885621.

Adding to 40540423 its reverse (32404504), we get a palindrome (72944927).

The spelling of 40540423 in words is "forty million, five hundred forty thousand, four hundred twenty-three".