12628881 has 12 divisors (see below), whose sum is σ = 18283408. Its totient is φ = 8400024.

The previous prime is 12628879. The next prime is 12628907. The reversal of 12628881 is 18882621.

It is not a de Polignac number, because 12628881 - 2¹ = 12628879 is a prime.

It is a super-2 number, since 2×12628881² = 318977270624322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12628801) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3366 + ... + 6048.

Almost surely, 2^12628881 is an apocalyptic number.

It is an amenable number.

12628881 is a deficient number, since it is larger than the sum of its proper divisors (5654527).

12628881 is a wasteful number, since it uses less digits than its factorization.

12628881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3212 (or 3209 counting only the distinct ones).

The product of its digits is 12288, while the sum is 36.

The square root of 12628881 is about 3553.7136913376. The cubic root of 12628881 is about 232.8743328189.

The spelling of 12628881 in words is "twelve million, six hundred twenty-eight thousand, eight hundred eighty-one".