40478918 has 8 divisors (see below), whose sum is σ = 60799248. Its totient is φ = 20212504.

The previous prime is 40478903. The next prime is 40478927. The reversal of 40478918 is 81987404.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11546 + ... + 14637.

It is an arithmetic number, because the mean of its divisors is an integer number (7599906).

Almost surely, 2^40478918 is an apocalyptic number.

40478918 is a deficient number, since it is larger than the sum of its proper divisors (20320330).

40478918 is a wasteful number, since it uses less digits than its factorization.

40478918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26958.

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 40478918 is about 6362.3044567201. The cubic root of 40478918 is about 343.3546751011.

The spelling of 40478918 in words is "forty million, four hundred seventy-eight thousand, nine hundred eighteen".