40804018 has 4 divisors (see below), whose sum is σ = 61206030. Its totient is φ = 20402008.

The previous prime is 40804013. The next prime is 40804021. The reversal of 40804018 is 81040804.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 26081449 + 14722569 = 5107^2 + 3837^2 .

It is a junction number, because it is equal to n+sod(n) for n = 40803983 and 40804001.

It is not an unprimeable number, because it can be changed into a prime (40804013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10201003 + ... + 10201006.

Almost surely, 2^40804018 is an apocalyptic number.

40804018 is a deficient number, since it is larger than the sum of its proper divisors (20402012).

40804018 is a wasteful number, since it uses less digits than its factorization.

40804018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20402011.

The product of its (nonzero) digits is 1024, while the sum is 25.

The square root of 40804018 is about 6387.8022824756. The cubic root of 40804018 is about 344.2714247317.

The spelling of 40804018 in words is "forty million, eight hundred four thousand, eighteen".