128677712 has 20 divisors (see below), whose sum is σ = 256052436. Its totient is φ = 62599680.

The previous prime is 128677697. The next prime is 128677729. The reversal of 128677712 is 217776821.

It can be written as a sum of positive squares in 2 ways, for example, as 47389456 + 81288256 = 6884^2 + 9016^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 128677712.

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, 108089 + ... + 109272.

Almost surely, 2^128677712 is an apocalyptic number.

It is an amenable number.

128677712 is a deficient number, since it is larger than the sum of its proper divisors (127374724).

128677712 is a wasteful number, since it uses less digits than its factorization.

128677712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217406 (or 217400 counting only the distinct ones).

The product of its digits is 65856, while the sum is 41.

The square root of 128677712 is about 11343.6198807964. The cubic root of 128677712 is about 504.8562960716.

The spelling of 128677712 in words is "one hundred twenty-eight million, six hundred seventy-seven thousand, seven hundred twelve".