128192988 has 96 divisors (see below), whose sum is σ = 394910208. Its totient is φ = 31334400.

The previous prime is 128192983. The next prime is 128192989. The reversal of 128192988 is 889291821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128192983) 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 in 31 ways as a sum of consecutive naturals, for example, 11628 + ... + 19788.

It is an arithmetic number, because the mean of its divisors is an integer number (4113648).

Almost surely, 2^128192988 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128192988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (197455104).

128192988 is an abundant number, since it is smaller than the sum of its proper divisors (266717220).

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

128192988 is a wasteful number, since it uses less digits than its factorization.

128192988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8203 (or 8201 counting only the distinct ones).

The product of its digits is 165888, while the sum is 48.

The square root of 128192988 is about 11322.2342318113. The cubic root of 128192988 is about 504.2215736511.

The spelling of 128192988 in words is "one hundred twenty-eight million, one hundred ninety-two thousand, nine hundred eighty-eight".