636948 has 36 divisors (see below), whose sum is σ = 1735188. Its totient is φ = 195840.

The previous prime is 636947. The next prime is 636953. The reversal of 636948 is 849636.

It can be written as a sum of positive squares in 2 ways, for example, as 101124 + 535824 = 318^2 + 732^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an Ulam 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 636948.

It is not an unprimeable number, because it can be changed into a prime (636947) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 213 + ... + 1148.

2⁶³⁶⁹⁴⁸ is an apocalyptic number.

It is an amenable number.

636948 is an abundant number, since it is smaller than the sum of its proper divisors (1098240).

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

636948 is a wasteful number, since it uses less digits than its factorization.

636948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1384 (or 1379 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 636948 is about 798.0902204638. The cubic root of 636948 is about 86.0401831326.

The spelling of 636948 in words is "six hundred thirty-six thousand, nine hundred forty-eight".