128665032 has 16 divisors (see below), whose sum is σ = 321662640. Its totient is φ = 42888336.

The previous prime is 128664961. The next prime is 128665081. The reversal of 128665032 is 230566821.

It is a super-3 number, since 3×128665032³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 128664984 and 128665002.

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, 2680498 + ... + 2680545.

It is an arithmetic number, because the mean of its divisors is an integer number (20103915).

Almost surely, 2^128665032 is an apocalyptic number.

128665032 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128665032 is an abundant number, since it is smaller than the sum of its proper divisors (192997608).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128665032 is a wasteful number, since it uses less digits than its factorization.

128665032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5361052 (or 5361048 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 128665032 is about 11343.0609625445. The cubic root of 128665032 is about 504.8397125519.

The spelling of 128665032 in words is "one hundred twenty-eight million, six hundred sixty-five thousand, thirty-two".