636495 has 8 divisors (see below), whose sum is σ = 1018416. Its totient is φ = 339456.

The previous prime is 636473. The next prime is 636499. The reversal of 636495 is 594636.

It is a happy number.

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

It is not a de Polignac number, because 636495 - 2⁹ = 635983 is a prime.

636495 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 636495.

It is not an unprimeable number, because it can be changed into a prime (636499) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21202 + ... + 21231.

It is an arithmetic number, because the mean of its divisors is an integer number (127302).

2⁶³⁶⁴⁹⁵ is an apocalyptic number.

636495 is a deficient number, since it is larger than the sum of its proper divisors (381921).

636495 is a wasteful number, since it uses less digits than its factorization.

636495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42441.

The product of its digits is 19440, while the sum is 33.

The square root of 636495 is about 797.8063674852. The cubic root of 636495 is about 86.0197809195.

The spelling of 636495 in words is "six hundred thirty-six thousand, four hundred ninety-five".