40044636 has 18 divisors (see below), whose sum is σ = 101224032. Its totient is φ = 13348200.

The previous prime is 40044629. The next prime is 40044677. The reversal of 40044636 is 63644004.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 556140 + ... + 556211.

Almost surely, 2^40044636 is an apocalyptic number.

It is an amenable number.

40044636 is an abundant number, since it is smaller than the sum of its proper divisors (61179396).

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

40044636 is a wasteful number, since it uses less digits than its factorization.

40044636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112361 (or 1112356 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 40044636 is about 6328.0831220837. The cubic root of 40044636 is about 342.1223528571.

The spelling of 40044636 in words is "forty million, forty-four thousand, six hundred thirty-six".