40331618 has 16 divisors (see below), whose sum is σ = 62407800. Its totient is φ = 19536000.

The previous prime is 40331587. The next prime is 40331639. The reversal of 40331618 is 81613304.

40331618 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 10004569 + 30327049 = 3163^2 + 5507^2 .

It is a Curzon number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 10568 + ... + 13868.

Almost surely, 2^40331618 is an apocalyptic number.

40331618 is a deficient number, since it is larger than the sum of its proper divisors (22076182).

40331618 is a wasteful number, since it uses less digits than its factorization.

40331618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3493.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 40331618 is about 6350.7179121734. The cubic root of 40331618 is about 342.9376875417.

The spelling of 40331618 in words is "forty million, three hundred thirty-one thousand, six hundred eighteen".