12661628 has 12 divisors (see below), whose sum is σ = 25323312. Its totient is φ = 5426400.

The previous prime is 12661613. The next prime is 12661633. The reversal of 12661628 is 82616621.

12661628 is digitally balanced in base 2 and base 8, because in such bases it contains all the possibile digits an equal number of times.

12661628 is an admirable number.

It is a super-2 number, since 2×12661628² = 320633647220768, which contains 22 as substring.

12661628 is strictly pandigital in base 8.

It is a junction number, because it is equal to n+sod(n) for n = 12661594 and 12661603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 226073 + ... + 226128.

It is an arithmetic number, because the mean of its divisors is an integer number (2110276).

Almost surely, 2^12661628 is an apocalyptic number.

It is an amenable number.

12661628 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12661628 is a wasteful number, since it uses less digits than its factorization.

12661628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452212 (or 452210 counting only the distinct ones).

The product of its digits is 6912, while the sum is 32.

The square root of 12661628 is about 3558.3181420441. The cubic root of 12661628 is about 233.0754420552.

The spelling of 12661628 in words is "twelve million, six hundred sixty-one thousand, six hundred twenty-eight".