40478018 has 24 divisors (see below), whose sum is σ = 74350800. Its totient is φ = 16433928.

The previous prime is 40477981. The next prime is 40478027. The reversal of 40478018 is 81087404.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 9008 + ... + 12731.

It is an arithmetic number, because the mean of its divisors is an integer number (3097950).

Almost surely, 2^40478018 is an apocalyptic number.

40478018 is a deficient number, since it is larger than the sum of its proper divisors (33872782).

40478018 is a wasteful number, since it uses less digits than its factorization.

40478018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21774 (or 21767 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 40478018 is about 6362.2337272376. The cubic root of 40478018 is about 343.3521303897.

The spelling of 40478018 in words is "forty million, four hundred seventy-eight thousand, eighteen".