40424 has 16 divisors (see below), whose sum is σ = 78720. Its totient is φ = 19440.

The previous prime is 40423. The next prime is 40427. The reversal of 40424 is 42404.

40424 = 2² + 3² + ... + 49².

It is a plaindrome in base 7.

It is a zygodrome in base 7.

It is a junction number, because it is equal to n+sod(n) for n = 40399 and 40408.

It is not an unprimeable number, because it can be changed into a prime (40423) 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, 167 + ... + 329.

It is an arithmetic number, because the mean of its divisors is an integer number (4920).

2⁴⁰⁴²⁴ is an apocalyptic number.

It is an amenable number.

40424 is a deficient number, since it is larger than the sum of its proper divisors (38296).

40424 is a wasteful number, since it uses less digits than its factorization.

40424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200 (or 196 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 40424 is about 201.0572057898. The cubic root of 40424 is about 34.3199327685.

Adding to 40424 its reverse (42404), we get a palindrome (82828).

It can be divided in two parts, 40 and 424, that added together give a palindrome (464).

The spelling of 40424 in words is "forty thousand, four hundred twenty-four", and thus it is an iban number.