40611818 has 16 divisors (see below), whose sum is σ = 66028200. Its totient is φ = 18622656.

The previous prime is 40611811. The next prime is 40611847. The reversal of 40611818 is 81811604.

It can be written as a sum of positive squares in 4 ways, for example, as 21836929 + 18774889 = 4673^2 + 4333^2 .

It is a super-2 number, since 2×40611818² = 3298639522530248, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40611811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 893 + ... + 9056.

Almost surely, 2^40611818 is an apocalyptic number.

40611818 is a deficient number, since it is larger than the sum of its proper divisors (25416382).

40611818 is a wasteful number, since it uses less digits than its factorization.

40611818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10121.

The product of its (nonzero) digits is 1536, while the sum is 29.

The square root of 40611818 is about 6372.7402269353. The cubic root of 40611818 is about 343.7300308841.

The spelling of 40611818 in words is "forty million, six hundred eleven thousand, eight hundred eighteen".