40478489 has 2 divisors, whose sum is σ = 40478490. Its totient is φ = 40478488.

The previous prime is 40478447. The next prime is 40478497. The reversal of 40478489 is 98487404.

40478489 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., 37699600 + 2778889 = 6140^2 + 1667^2 .

It is a cyclic number.

It is not a de Polignac number, because 40478489 - 2¹² = 40474393 is a prime.

It is a super-3 number, since 3×40478489³ (a number of 24 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (40478429) 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, 20239244 + 20239245.

It is an arithmetic number, because the mean of its divisors is an integer number (20239245).

Almost surely, 2^40478489 is an apocalyptic number.

It is an amenable number.

40478489 is a deficient number, since it is larger than the sum of its proper divisors (1).

40478489 is an equidigital number, since it uses as much as digits as its factorization.

40478489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 258048, while the sum is 44.

The square root of 40478489 is about 6362.2707424315. The cubic root of 40478489 is about 343.3534621267.

The spelling of 40478489 in words is "forty million, four hundred seventy-eight thousand, four hundred eighty-nine".