128042028 has 108 divisors (see below), whose sum is σ = 355805632. Its totient is φ = 38776320.

The previous prime is 128042027. The next prime is 128042029. The reversal of 128042028 is 820240821.

It is an interprime number because it is at equal distance from previous prime (128042027) and next prime (128042029).

It is a junction number, because it is equal to n+sod(n) for n = 128041992 and 128042010.

It is not an unprimeable number, because it can be changed into a prime (128042021) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 322326 + ... + 322722.

Almost surely, 2^128042028 is an apocalyptic number.

128042028 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128042028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177902816).

128042028 is an abundant number, since it is smaller than the sum of its proper divisors (227763604).

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

128042028 is a wasteful number, since it uses less digits than its factorization.

128042028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472 (or 450 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 128042028 is about 11315.5657392814. The cubic root of 128042028 is about 504.0235722157.

Adding to 128042028 its reverse (820240821), we get a palindrome (948282849).

The spelling of 128042028 in words is "one hundred twenty-eight million, forty-two thousand, twenty-eight".