128764 has 6 divisors (see below), whose sum is σ = 225344. Its totient is φ = 64380.

The previous prime is 128761. The next prime is 128767. The reversal of 128764 is 467821.

It is an interprime number because it is at equal distance from previous prime (128761) and next prime (128767).

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16092 + ... + 16099.

2¹²⁸⁷⁶⁴ is an apocalyptic number.

It is an amenable number.

128764 is a deficient number, since it is larger than the sum of its proper divisors (96580).

128764 is a wasteful number, since it uses less digits than its factorization.

128764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32195 (or 32193 counting only the distinct ones).

The product of its digits is 2688, while the sum is 28.

The square root of 128764 is about 358.8370103543. The cubic root of 128764 is about 50.4969118786.

It can be divided in two parts, 12876 and 4, that added together give a triangular number (12880 = T₁₆₀).

The spelling of 128764 in words is "one hundred twenty-eight thousand, seven hundred sixty-four".