40818169 has 24 divisors (see below), whose sum is σ = 49761152. Its totient is φ = 32788800.

The previous prime is 40818163. The next prime is 40818187. The reversal of 40818169 is 96181804.

It is a happy number.

It is not a de Polignac number, because 40818169 - 2¹¹ = 40816121 is a prime.

It is a super-2 number, since 2×40818169² = 3332245841025122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40818163) 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 23 ways as a sum of consecutive naturals, for example, 270244 + ... + 270394.

Almost surely, 2^40818169 is an apocalyptic number.

It is an amenable number.

40818169 is a deficient number, since it is larger than the sum of its proper divisors (8942983).

40818169 is a wasteful number, since it uses less digits than its factorization.

40818169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277 (or 254 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 40818169 is about 6388.9098444101. The cubic root of 40818169 is about 344.3112183769.

The spelling of 40818169 in words is "forty million, eight hundred eighteen thousand, one hundred sixty-nine".