40478656 has 28 divisors (see below), whose sum is σ = 82039968. Its totient is φ = 19807232.

The previous prime is 40478651. The next prime is 40478663. The reversal of 40478656 is 65687404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40478651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3721 + ... + 9736.

Almost surely, 2^40478656 is an apocalyptic number.

It is an amenable number.

40478656 is an abundant number, since it is smaller than the sum of its proper divisors (41561312).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40478656 is a wasteful number, since it uses less digits than its factorization.

40478656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13516 (or 13506 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 40.

The square root of 40478656 is about 6362.2838666630. The cubic root of 40478656 is about 343.3539343112.

The spelling of 40478656 in words is "forty million, four hundred seventy-eight thousand, six hundred fifty-six".