12977648 has 40 divisors (see below), whose sum is σ = 26206656. Its totient is φ = 6220800.

The previous prime is 12977617. The next prime is 12977651. The reversal of 12977648 is 84677921.

It is a super-2 number, since 2×12977648² = 336838695223808, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12977599 and 12977608.

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, 47753 + ... + 48023.

Almost surely, 2^12977648 is an apocalyptic number.

It is an amenable number.

12977648 is an abundant number, since it is smaller than the sum of its proper divisors (13229008).

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

12977648 is a wasteful number, since it uses less digits than its factorization.

12977648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393 (or 387 counting only the distinct ones).

The product of its digits is 169344, while the sum is 44.

The square root of 12977648 is about 3602.4502772419. The cubic root of 12977648 is about 234.9986298396.

It can be divided in two parts, 129 and 77648, that added together give a palindrome (77777).

The spelling of 12977648 in words is "twelve million, nine hundred seventy-seven thousand, six hundred forty-eight".