12688630 has 32 divisors (see below), whose sum is σ = 24455520. Its totient is φ = 4723200.

The previous prime is 12688609. The next prime is 12688649. The reversal of 12688630 is 3688621.

It is a super-2 number, since 2×12688630² = 322002662553800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16801 + ... + 17539.

It is an arithmetic number, because the mean of its divisors is an integer number (764235).

Almost surely, 2^12688630 is an apocalyptic number.

12688630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12688630 is a deficient number, since it is larger than the sum of its proper divisors (11766890).

12688630 is a wasteful number, since it uses less digits than its factorization.

12688630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 12688630 is about 3562.1103295659. The cubic root of 12688630 is about 233.2410088257.

Subtracting from 12688630 its reverse (3688621), we obtain a palindrome (9000009).

The spelling of 12688630 in words is "twelve million, six hundred eighty-eight thousand, six hundred thirty".