128958768 has 60 divisors (see below), whose sum is σ = 362303448. Its totient is φ = 42819840.

The previous prime is 128958749. The next prime is 128958799. The reversal of 128958768 is 867859821.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38871 + ... + 42057.

Almost surely, 2^128958768 is an apocalyptic number.

128958768 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 128958768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (181151724).

128958768 is an abundant number, since it is smaller than the sum of its proper divisors (233344680).

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

128958768 is a wasteful number, since it uses less digits than its factorization.

128958768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3482 (or 3473 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 54.

The square root of 128958768 is about 11356.0014089467. The cubic root of 128958768 is about 505.2235953946.

The spelling of 128958768 in words is "one hundred twenty-eight million, nine hundred fifty-eight thousand, seven hundred sixty-eight".