128240868 has 48 divisors (see below), whose sum is σ = 342723584. Its totient is φ = 36560160.

The previous prime is 128240857. The next prime is 128240869. The reversal of 128240868 is 868042821.

It is not an unprimeable number, because it can be changed into a prime (128240869) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44553 + ... + 47343.

Almost surely, 2^128240868 is an apocalyptic number.

It is an amenable number.

128240868 is an abundant number, since it is smaller than the sum of its proper divisors (214482716).

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

128240868 is a wasteful number, since it uses less digits than its factorization.

128240868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3352 (or 3350 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 39.

The square root of 128240868 is about 11324.3484580792. The cubic root of 128240868 is about 504.2843413169.

The spelling of 128240868 in words is "one hundred twenty-eight million, two hundred forty thousand, eight hundred sixty-eight".