40636 has 6 divisors (see below), whose sum is σ = 71120. Its totient is φ = 20316.

The previous prime is 40627. The next prime is 40637. The reversal of 40636 is 63604.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5076 + ... + 5083.

2⁴⁰⁶³⁶ is an apocalyptic number.

It is an amenable number.

40636 is a deficient number, since it is larger than the sum of its proper divisors (30484).

40636 is a wasteful number, since it uses less digits than its factorization.

40636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10163 (or 10161 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 40636 is about 201.5837295022. The cubic root of 40636 is about 34.3798241164.

Subtracting from 40636 its product of nonzero digits (432), we obtain a palindrome (40204).

It can be divided in two parts, 40 and 636, that added together give a palindrome (676).

The spelling of 40636 in words is "forty thousand, six hundred thirty-six".