128231284 has 24 divisors (see below), whose sum is σ = 228191040. Its totient is φ = 63042816.

The previous prime is 128231281. The next prime is 128231287. The reversal of 128231284 is 482132821.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (128231281) and next prime (128231287).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128231281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63807 + ... + 65785.

It is an arithmetic number, because the mean of its divisors is an integer number (9507960).

Almost surely, 2^128231284 is an apocalyptic number.

It is an amenable number.

128231284 is a deficient number, since it is larger than the sum of its proper divisors (99959756).

128231284 is a wasteful number, since it uses less digits than its factorization.

128231284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2247 (or 2245 counting only the distinct ones).

The product of its digits is 6144, while the sum is 31.

The square root of 128231284 is about 11323.9252911700. The cubic root of 128231284 is about 504.2717785470.

The spelling of 128231284 in words is "one hundred twenty-eight million, two hundred thirty-one thousand, two hundred eighty-four".