636498 has 20 divisors (see below), whose sum is σ = 1426590. Its totient is φ = 212112.

The previous prime is 636473. The next prime is 636499. The reversal of 636498 is 894636.

636498 is a `hidden beast` number, since 6 + 3 + 649 + 8 = 666.

636498 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 613089 + 23409 = 783^2 + 153^2 .

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

636498 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1803 + ... + 2126.

2⁶³⁶⁴⁹⁸ is an apocalyptic number.

636498 is an abundant number, since it is smaller than the sum of its proper divisors (790092).

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

636498 is a wasteful number, since it uses less digits than its factorization.

636498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3943 (or 3934 counting only the distinct ones).

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

The square root of 636498 is about 797.8082476385. The cubic root of 636498 is about 86.0199160653.

It can be divided in two parts, 63 and 6498, that added together give a 8-th power (6561 = 3⁸).

The spelling of 636498 in words is "six hundred thirty-six thousand, four hundred ninety-eight".