128488892 has 12 divisors (see below), whose sum is σ = 256977840. Its totient is φ = 55066656.

The previous prime is 128488891. The next prime is 128488903. The reversal of 128488892 is 298884821.

It is a happy number.

128488892 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 128488892.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128488891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2294417 + ... + 2294472.

It is an arithmetic number, because the mean of its divisors is an integer number (21414820).

Almost surely, 2^128488892 is an apocalyptic number.

It is an amenable number.

128488892 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

128488892 is a wasteful number, since it uses less digits than its factorization.

128488892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4588900 (or 4588898 counting only the distinct ones).

The product of its digits is 589824, while the sum is 50.

The square root of 128488892 is about 11335.2940852895. The cubic root of 128488892 is about 504.6092353347.

The spelling of 128488892 in words is "one hundred twenty-eight million, four hundred eighty-eight thousand, eight hundred ninety-two".