40635646 has 8 divisors (see below), whose sum is σ = 61242984. Its totient is φ = 20221320.

The previous prime is 40635631. The next prime is 40635649. The reversal of 40635646 is 64653604.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40635649) 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, 47725 + ... + 48568.

It is an arithmetic number, because the mean of its divisors is an integer number (7655373).

Almost surely, 2^40635646 is an apocalyptic number.

40635646 is a deficient number, since it is larger than the sum of its proper divisors (20607338).

40635646 is a wasteful number, since it uses less digits than its factorization.

40635646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96506.

The product of its (nonzero) digits is 51840, while the sum is 34.

The square root of 40635646 is about 6374.6094782347. The cubic root of 40635646 is about 343.7972428293.

The spelling of 40635646 in words is "forty million, six hundred thirty-five thousand, six hundred forty-six".