40637856 has 144 divisors (see below), whose sum is σ = 127207584. Its totient is φ = 11321856.

The previous prime is 40637809. The next prime is 40637893. The reversal of 40637856 is 65873604.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 249231 + ... + 249393.

It is an arithmetic number, because the mean of its divisors is an integer number (883386).

Almost surely, 2^40637856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40637856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63603792).

40637856 is an abundant number, since it is smaller than the sum of its proper divisors (86569728).

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

40637856 is a wasteful number, since it uses less digits than its factorization.

40637856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243 (or 228 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 39.

The square root of 40637856 is about 6374.7828198300. The cubic root of 40637856 is about 343.8034752730.

The spelling of 40637856 in words is "forty million, six hundred thirty-seven thousand, eight hundred fifty-six".