128168028 has 24 divisors (see below), whose sum is σ = 332287760. Its totient is φ = 42722640.

The previous prime is 128168011. The next prime is 128168069. The reversal of 128168028 is 820861821.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 128167983 and 128168001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 593263 + ... + 593478.

Almost surely, 2^128168028 is an apocalyptic number.

128168028 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

128168028 is an abundant number, since it is smaller than the sum of its proper divisors (204119732).

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

128168028 is a wasteful number, since it uses less digits than its factorization.

128168028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1186754 (or 1186746 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 36.

The square root of 128168028 is about 11321.1319222064. The cubic root of 128168028 is about 504.1888464648.

The spelling of 128168028 in words is "one hundred twenty-eight million, one hundred sixty-eight thousand, twenty-eight".