636318 has 48 divisors (see below), whose sum is σ = 1516320. Its totient is φ = 192192.

The previous prime is 636313. The next prime is 636319. The reversal of 636318 is 813636.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 636291 and 636300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636313) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11980 + ... + 12032.

It is an arithmetic number, because the mean of its divisors is an integer number (31590).

2⁶³⁶³¹⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 636318, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (758160).

636318 is an abundant number, since it is smaller than the sum of its proper divisors (880002).

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

636318 is a wasteful number, since it uses less digits than its factorization.

636318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113 (or 110 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 636318 is about 797.6954305999. The cubic root of 636318 is about 86.0118065637.

The spelling of 636318 in words is "six hundred thirty-six thousand, three hundred eighteen".