40438478 has 16 divisors (see below), whose sum is σ = 64424160. Its totient is φ = 18971136.

The previous prime is 40438469. The next prime is 40438483. The reversal of 40438478 is 87483404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10550 + ... + 13862.

It is an arithmetic number, because the mean of its divisors is an integer number (4026510).

Almost surely, 2^40438478 is an apocalyptic number.

40438478 is a deficient number, since it is larger than the sum of its proper divisors (23985682).

40438478 is a wasteful number, since it uses less digits than its factorization.

40438478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3691.

The product of its (nonzero) digits is 86016, while the sum is 38.

The square root of 40438478 is about 6359.1255688184. The cubic root of 40438478 is about 343.2402954826.

It can be divided in two parts, 4043 and 8478, that added together give a palindrome (12521).

The spelling of 40438478 in words is "forty million, four hundred thirty-eight thousand, four hundred seventy-eight".