128365677 has 12 divisors (see below), whose sum is σ = 202273344. Its totient is φ = 77797320.

The previous prime is 128365673. The next prime is 128365681. The reversal of 128365677 is 776563821.

128365677 is a `hidden beast` number, since 1 + 2 + 83 + 6 + 567 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (128365673) and next prime (128365681).

It is not a de Polignac number, because 128365677 - 2² = 128365673 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128365673) 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, 648213 + ... + 648410.

It is an arithmetic number, because the mean of its divisors is an integer number (16856112).

Almost surely, 2^128365677 is an apocalyptic number.

It is an amenable number.

128365677 is a deficient number, since it is larger than the sum of its proper divisors (73907667).

128365677 is a wasteful number, since it uses less digits than its factorization.

128365677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1296640 (or 1296637 counting only the distinct ones).

The product of its digits is 423360, while the sum is 45.

The square root of 128365677 is about 11329.8577660975. The cubic root of 128365677 is about 504.4478846503.

The spelling of 128365677 in words is "one hundred twenty-eight million, three hundred sixty-five thousand, six hundred seventy-seven".