40005518 has 32 divisors (see below), whose sum is σ = 70253568. Its totient is φ = 16732800.

The previous prime is 40005479. The next prime is 40005541. The reversal of 40005518 is 81550004.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 40005493 and 40005502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 165878 + ... + 166118.

It is an arithmetic number, because the mean of its divisors is an integer number (2195424).

Almost surely, 2^40005518 is an apocalyptic number.

40005518 is a deficient number, since it is larger than the sum of its proper divisors (30248050).

40005518 is a wasteful number, since it uses less digits than its factorization.

40005518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 40005518 is about 6324.9915414963. The cubic root of 40005518 is about 342.0109146910.

The spelling of 40005518 in words is "forty million, five thousand, five hundred eighteen".