40478297 has 4 divisors (see below), whose sum is σ = 40702116. Its totient is φ = 40254480.

The previous prime is 40478293. The next prime is 40478299. The reversal of 40478297 is 79287404.

40478297 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2298256 + 38180041 = 1516^2 + 6179^2 .

It is a cyclic number.

It is not a de Polignac number, because 40478297 - 2² = 40478293 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40478293) 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 3 ways as a sum of consecutive naturals, for example, 111638 + ... + 111999.

It is an arithmetic number, because the mean of its divisors is an integer number (10175529).

Almost surely, 2^40478297 is an apocalyptic number.

It is an amenable number.

40478297 is a deficient number, since it is larger than the sum of its proper divisors (223819).

40478297 is a wasteful number, since it uses less digits than its factorization.

40478297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223818.

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 40478297 is about 6362.2556534613. The cubic root of 40478297 is about 343.3529192543.

The spelling of 40478297 in words is "forty million, four hundred seventy-eight thousand, two hundred ninety-seven".