128868078 has 16 divisors (see below), whose sum is σ = 263220480. Its totient is φ = 42041976.

The previous prime is 128868071. The next prime is 128868101. The reversal of 128868078 is 870868821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128868071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 228208 + ... + 228771.

It is an arithmetic number, because the mean of its divisors is an integer number (16451280).

Almost surely, 2^128868078 is an apocalyptic number.

128868078 is an abundant number, since it is smaller than the sum of its proper divisors (134352402).

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

128868078 is a wasteful number, since it uses less digits than its factorization.

128868078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457031.

The product of its (nonzero) digits is 344064, while the sum is 48.

The square root of 128868078 is about 11352.0076638452. The cubic root of 128868078 is about 505.1051351213.

The spelling of 128868078 in words is "one hundred twenty-eight million, eight hundred sixty-eight thousand, seventy-eight".