12912028 has 24 divisors (see below), whose sum is σ = 23268672. Its totient is φ = 6266304.

The previous prime is 12912017. The next prime is 12912037. The reversal of 12912028 is 82021921.

It is a junction number, because it is equal to n+sod(n) for n = 12911993 and 12912011.

It is a congruent number.

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, 32326 + ... + 32722.

It is an arithmetic number, because the mean of its divisors is an integer number (969528).

Almost surely, 2^12912028 is an apocalyptic number.

It is an amenable number.

12912028 is a deficient number, since it is larger than the sum of its proper divisors (10356644).

12912028 is a wasteful number, since it uses less digits than its factorization.

12912028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621 (or 619 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 12912028 is about 3593.3310451446. The cubic root of 12912028 is about 234.6018791032.

Adding to 12912028 its reverse (82021921), we get a palindrome (94933949).

The spelling of 12912028 in words is "twelve million, nine hundred twelve thousand, twenty-eight".