40105418 has 8 divisors (see below), whose sum is σ = 61293348. Its totient is φ = 19674304.

The previous prime is 40105411. The next prime is 40105433. The reversal of 40105418 is 81450104.

It can be written as a sum of positive squares in 2 ways, for example, as 37982569 + 2122849 = 6163^2 + 1457^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 40105393 and 40105402.

It is not an unprimeable number, because it can be changed into a prime (40105411) 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, 189071 + ... + 189282.

Almost surely, 2^40105418 is an apocalyptic number.

40105418 is a deficient number, since it is larger than the sum of its proper divisors (21187930).

40105418 is a wasteful number, since it uses less digits than its factorization.

40105418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378408.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 40105418 is about 6332.8838612436. The cubic root of 40105418 is about 342.2953628660.

The spelling of 40105418 in words is "forty million, one hundred five thousand, four hundred eighteen".