40418 has 8 divisors (see below), whose sum is σ = 69312. Its totient is φ = 17316.

The previous prime is 40387. The next prime is 40423. The reversal of 40418 is 81404.

It is a happy number.

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

It is a super-2 number, since 2×40418² = 3267229448, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40396 and 40405.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1430 + ... + 1457.

It is an arithmetic number, because the mean of its divisors is an integer number (8664).

2⁴⁰⁴¹⁸ is an apocalyptic number.

40418 is a deficient number, since it is larger than the sum of its proper divisors (28894).

40418 is a wasteful number, since it uses less digits than its factorization.

40418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2896.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 40418 is about 201.0422841096. The cubic root of 40418 is about 34.3182346866.

Subtracting from 40418 its sum of digits (17), we obtain a square (40401 = 201²).

The spelling of 40418 in words is "forty thousand, four hundred eighteen".