40056618 has 24 divisors (see below), whose sum is σ = 93193632. Its totient is φ = 11444664.

The previous prime is 40056613. The next prime is 40056629. The reversal of 40056618 is 81665004.

40056618 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a nialpdrome in base 7.

It is not an unprimeable number, because it can be changed into a prime (40056613) 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 in 11 ways as a sum of consecutive naturals, for example, 67830 + ... + 68417.

It is an arithmetic number, because the mean of its divisors is an integer number (3883068).

Almost surely, 2^40056618 is an apocalyptic number.

40056618 is an abundant number, since it is smaller than the sum of its proper divisors (53137014).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40056618 is a wasteful number, since it uses less digits than its factorization.

40056618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136266 (or 136259 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 40056618 is about 6329.0297834660. The cubic root of 40056618 is about 342.1564722935.

The spelling of 40056618 in words is "forty million, fifty-six thousand, six hundred eighteen".