128283955988 has 12 divisors (see below), whose sum is σ = 225108633792. Its totient is φ = 63967203480.

The previous prime is 128283955913. The next prime is 128283955993. The reversal of 128283955988 is 889559382821.

It is a super-3 number, since 3×128283955988³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a hoax number, since the sum of its digits (68) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 43691978 + ... + 43694913.

It is an arithmetic number, because the mean of its divisors is an integer number (18759052816).

Almost surely, 2^128283955988 is an apocalyptic number.

It is an amenable number.

128283955988 is a deficient number, since it is larger than the sum of its proper divisors (96824677804).

128283955988 is a wasteful number, since it uses less digits than its factorization.

128283955988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87387262 (or 87387260 counting only the distinct ones).

The product of its digits is 99532800, while the sum is 68.

The spelling of 128283955988 in words is "one hundred twenty-eight billion, two hundred eighty-three million, nine hundred fifty-five thousand, nine hundred eighty-eight".