40518038 has 32 divisors (see below), whose sum is σ = 70823808. Its totient is φ = 17180800.

The previous prime is 40518031. The next prime is 40518047. The reversal of 40518038 is 83081504.

It is a super-2 number, since 2×40518038² = 3283422806738888, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40518038.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40518031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48581 + ... + 49407.

It is an arithmetic number, because the mean of its divisors is an integer number (2213244).

Almost surely, 2^40518038 is an apocalyptic number.

40518038 is a deficient number, since it is larger than the sum of its proper divisors (30305770).

40518038 is a wasteful number, since it uses less digits than its factorization.

40518038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 988.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 40518038 is about 6365.3780720394. The cubic root of 40518038 is about 343.4652487926.

The spelling of 40518038 in words is "forty million, five hundred eighteen thousand, thirty-eight".