40478403 has 16 divisors (see below), whose sum is σ = 63809280. Its totient is φ = 22332576.

The previous prime is 40478393. The next prime is 40478423. The reversal of 40478403 is 30487404.

40478403 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 40478403 - 2⁴ = 40478387 is a prime.

It is a super-2 number, since 2×40478403² = 3277002218860818, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40478423) 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, 32625 + ... + 33842.

It is an arithmetic number, because the mean of its divisors is an integer number (3988080).

Almost surely, 2^40478403 is an apocalyptic number.

40478403 is a deficient number, since it is larger than the sum of its proper divisors (23330877).

40478403 is a wasteful number, since it uses less digits than its factorization.

40478403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66506.

The product of its (nonzero) digits is 10752, while the sum is 30.

The square root of 40478403 is about 6362.2639838347. The cubic root of 40478403 is about 343.3532189653.

Subtracting from 40478403 its reverse (30487404), we obtain a palindrome (9990999).

The spelling of 40478403 in words is "forty million, four hundred seventy-eight thousand, four hundred three".