40818938 has 12 divisors (see below), whose sum is σ = 65042862. Its totient is φ = 19208640.

The previous prime is 40818931. The next prime is 40818959. The reversal of 40818938 is 83981804.

It can be written as a sum of positive squares in 3 ways, for example, as 40360609 + 458329 = 6353^2 + 677^2 .

It is a junction number, because it is equal to n+sod(n) for n = 40818895 and 40818904.

It is not an unprimeable number, because it can be changed into a prime (40818931) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34733 + ... + 35888.

Almost surely, 2^40818938 is an apocalyptic number.

40818938 is a deficient number, since it is larger than the sum of its proper divisors (24223924).

40818938 is a wasteful number, since it uses less digits than its factorization.

40818938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70657 (or 70640 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 40818938 is about 6388.9700265379. The cubic root of 40818938 is about 344.3133805976.

The spelling of 40818938 in words is "forty million, eight hundred eighteen thousand, nine hundred thirty-eight".