128236608 has 140 divisors (see below), whose sum is σ = 393702540. Its totient is φ = 41223168.

The previous prime is 128236601. The next prime is 128236609. The reversal of 128236608 is 806632821.

128236608 is a `hidden beast` number, since 1 + 28 + 23 + 6 + 608 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 32353344 + 95883264 = 5688^2 + 9792^2 .

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

It is not an unprimeable number, because it can be changed into a prime (128236601) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 149910 + ... + 150762.

It is an arithmetic number, because the mean of its divisors is an integer number (2812161).

Almost surely, 2^128236608 is an apocalyptic number.

128236608 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 128236608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196851270).

128236608 is an abundant number, since it is smaller than the sum of its proper divisors (265465932).

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

128236608 is an equidigital number, since it uses as much as digits as its factorization.

128236608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906 (or 887 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 128236608 is about 11324.1603662258. The cubic root of 128236608 is about 504.2787573583.

The spelling of 128236608 in words is "one hundred twenty-eight million, two hundred thirty-six thousand, six hundred eight".