128089332 has 54 divisors (see below), whose sum is σ = 376648818. Its totient is φ = 36596448.

The previous prime is 128089307. The next prime is 128089343. The reversal of 128089332 is 233980821.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 121088016 + 7001316 = 11004^2 + 2646^2 .

It is a super-3 number, since 3×128089332³ (a number of 25 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 34543 + ... + 38070.

Almost surely, 2^128089332 is an apocalyptic number.

128089332 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128089332 is an abundant number, since it is smaller than the sum of its proper divisors (248559486).

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

128089332 is a wasteful number, since it uses less digits than its factorization.

128089332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72637 (or 72625 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 128089332 is about 11317.6557643357. The cubic root of 128089332 is about 504.0856335975.

The spelling of 128089332 in words is "one hundred twenty-eight million, eighty-nine thousand, three hundred thirty-two".