128377684 has 6 divisors (see below), whose sum is σ = 224660954. Its totient is φ = 64188840.

The previous prime is 128377681. The next prime is 128377703. The reversal of 128377684 is 486773821.

It can be written as a sum of positive squares in only one way, i.e., 111894084 + 16483600 = 10578^2 + 4060^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128377681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16047207 + ... + 16047214.

Almost surely, 2^128377684 is an apocalyptic number.

It is an amenable number.

128377684 is a deficient number, since it is larger than the sum of its proper divisors (96283270).

128377684 is a wasteful number, since it uses less digits than its factorization.

128377684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32094425 (or 32094423 counting only the distinct ones).

The product of its digits is 451584, while the sum is 46.

The square root of 128377684 is about 11330.3876367934. The cubic root of 128377684 is about 504.4636124186.

The spelling of 128377684 in words is "one hundred twenty-eight million, three hundred seventy-seven thousand, six hundred eighty-four".