128131284 has 12 divisors (see below), whose sum is σ = 298973024. Its totient is φ = 42710424.

The previous prime is 128131249. The next prime is 128131291. The reversal of 128131284 is 482131821.

It is a tau number, because it is divible by the number of its divisors (12).

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, 5338792 + ... + 5338815.

Almost surely, 2^128131284 is an apocalyptic number.

It is an amenable number.

128131284 is an abundant number, since it is smaller than the sum of its proper divisors (170841740).

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

128131284 is a wasteful number, since it uses less digits than its factorization.

128131284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10677614 (or 10677612 counting only the distinct ones).

The product of its digits is 3072, while the sum is 30.

The square root of 128131284 is about 11319.5089999523. The cubic root of 128131284 is about 504.1406605381.

The spelling of 128131284 in words is "one hundred twenty-eight million, one hundred thirty-one thousand, two hundred eighty-four".