12636040 has 32 divisors (see below), whose sum is σ = 28716480. Its totient is φ = 5003712.

The previous prime is 12636037. The next prime is 12636053. The reversal of 12636040 is 4063621.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2587 + ... + 5653.

It is an arithmetic number, because the mean of its divisors is an integer number (897390).

It is a vampire number, since it can be written as 2060 ⋅ 6134 (with its own digits).

Almost surely, 2^12636040 is an apocalyptic number.

12636040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12636040 is an abundant number, since it is smaller than the sum of its proper divisors (16080440).

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

12636040 is a wasteful number, since it uses less digits than its factorization.

12636040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3181 (or 3177 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 12636040 is about 3554.7208047890. The cubic root of 12636040 is about 232.9183280714.

Adding to 12636040 its reverse (4063621), we get a palindrome (16699661).

The spelling of 12636040 in words is "twelve million, six hundred thirty-six thousand, forty".