40478919 has 16 divisors (see below), whose sum is σ = 60652032. Its totient is φ = 23826528.

The previous prime is 40478903. The next prime is 40478927. The reversal of 40478919 is 91987404.

40478919 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40478919 - 2⁴ = 40478903 is a prime.

It is a super-3 number, since 3×40478919³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40478959) 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 15 ways as a sum of consecutive naturals, for example, 21667 + ... + 23460.

It is an arithmetic number, because the mean of its divisors is an integer number (3790752).

Almost surely, 2^40478919 is an apocalyptic number.

40478919 is a deficient number, since it is larger than the sum of its proper divisors (20173113).

40478919 is a wasteful number, since it uses less digits than its factorization.

40478919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45166.

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 40478919 is about 6362.3045353079. The cubic root of 40478919 is about 343.3546779286.

The spelling of 40478919 in words is "forty million, four hundred seventy-eight thousand, nine hundred nineteen".