40478293 has 2 divisors, whose sum is σ = 40478294. Its totient is φ = 40478292.

The previous prime is 40478213. The next prime is 40478299. The reversal of 40478293 is 39287404.

It is a happy number.

40478293 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40475044 + 3249 = 6362^2 + 57^2 .

It is a cyclic number.

It is not a de Polignac number, because 40478293 - 2⁹ = 40477781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40478299) 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 as a sum of consecutive naturals, namely, 20239146 + 20239147.

It is an arithmetic number, because the mean of its divisors is an integer number (20239147).

Almost surely, 2^40478293 is an apocalyptic number.

It is an amenable number.

40478293 is a deficient number, since it is larger than the sum of its proper divisors (1).

40478293 is an equidigital number, since it uses as much as digits as its factorization.

40478293 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 40478293 is about 6362.2553391074. The cubic root of 40478293 is about 343.3529079444.

The spelling of 40478293 in words is "forty million, four hundred seventy-eight thousand, two hundred ninety-three".