128688264 has 40 divisors (see below), whose sum is σ = 360448110. Its totient is φ = 42895872.

The previous prime is 128688247. The next prime is 128688271. The reversal of 128688264 is 462886821.

It can be written as a sum of positive squares in only one way, i.e., 126562500 + 2125764 = 11250^2 + 1458^2 .

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 98649 + ... + 99944.

Almost surely, 2^128688264 is an apocalyptic number.

It is an amenable number.

128688264 is an abundant number, since it is smaller than the sum of its proper divisors (231759846).

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

128688264 is a wasteful number, since it uses less digits than its factorization.

128688264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198611 (or 198598 counting only the distinct ones).

The product of its digits is 294912, while the sum is 45.

The square root of 128688264 is about 11344.0849785252. The cubic root of 128688264 is about 504.8700956591.

The spelling of 128688264 in words is "one hundred twenty-eight million, six hundred eighty-eight thousand, two hundred sixty-four".