40057018 has 4 divisors (see below), whose sum is σ = 60085530. Its totient is φ = 20028508.

The previous prime is 40057013. The next prime is 40057021. The reversal of 40057018 is 81075004.

40057018 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 38526849 + 1530169 = 6207^2 + 1237^2 .

It is a junction number, because it is equal to n+sod(n) for n = 40056983 and 40057001.

It is not an unprimeable number, because it can be changed into a prime (40057013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10014253 + ... + 10014256.

Almost surely, 2^40057018 is an apocalyptic number.

40057018 is a deficient number, since it is larger than the sum of its proper divisors (20028512).

40057018 is a wasteful number, since it uses less digits than its factorization.

40057018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20028511.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 40057018 is about 6329.0613838072. The cubic root of 40057018 is about 342.1576111992.

The spelling of 40057018 in words is "forty million, fifty-seven thousand, eighteen".