128677685 has 8 divisors (see below), whose sum is σ = 154476960. Its totient is φ = 102899664.

The previous prime is 128677667. The next prime is 128677697. The reversal of 128677685 is 586776821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128677685 - 2¹⁰ = 128676661 is a prime.

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, 15254 + ... + 22136.

It is an arithmetic number, because the mean of its divisors is an integer number (19309620).

Almost surely, 2^128677685 is an apocalyptic number.

It is an amenable number.

128677685 is a deficient number, since it is larger than the sum of its proper divisors (25799275).

128677685 is an equidigital number, since it uses as much as digits as its factorization.

128677685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10627.

The product of its digits is 1128960, while the sum is 50.

The square root of 128677685 is about 11343.6186907001. The cubic root of 128677685 is about 504.8562607608.

The spelling of 128677685 in words is "one hundred twenty-eight million, six hundred seventy-seven thousand, six hundred eighty-five".