636012 has 60 divisors (see below), whose sum is σ = 1802416. Its totient is φ = 194400.

The previous prime is 635989. The next prime is 636017. The reversal of 636012 is 210636.

It is a happy number.

636012 is a `hidden beast` number, since 63 + 601 + 2 = 666.

636012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×636012² = 809022528288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (636017) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4137 + ... + 4287.

2⁶³⁶⁰¹² is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 636012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (901208).

636012 is an abundant number, since it is smaller than the sum of its proper divisors (1166404).

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

636012 is a wasteful number, since it uses less digits than its factorization.

636012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180 (or 169 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 636012 is about 797.5036050075. The cubic root of 636012 is about 85.9980169004.

Adding to 636012 its reverse (210636), we get a palindrome (846648).

The spelling of 636012 in words is "six hundred thirty-six thousand, twelve".