636444012 has 24 divisors (see below), whose sum is σ = 1532941312. Its totient is φ = 205304400.

The previous prime is 636443999. The next prime is 636444013. The reversal of 636444012 is 210444636.

It is a super-2 number, since 2×636444012² = 810121960821312288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (636444013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 855064 + ... + 855807.

Almost surely, 2^636444012 is an apocalyptic number.

636444012 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

636444012 is an abundant number, since it is smaller than the sum of its proper divisors (896497300).

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

636444012 is a wasteful number, since it uses less digits than its factorization.

636444012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1710909 (or 1710907 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 636444012 is about 25227.8420004566. The cubic root of 636444012 is about 860.1748391596.

Adding to 636444012 its reverse (210444636), we get a palindrome (846888648).

The spelling of 636444012 in words is "six hundred thirty-six million, four hundred forty-four thousand, twelve".