128875290 has 64 divisors (see below), whose sum is σ = 327075840. Its totient is φ = 32408640.

The previous prime is 128875289. The next prime is 128875303. The reversal of 128875290 is 92578821.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 176907 + ... + 177633.

It is an arithmetic number, because the mean of its divisors is an integer number (5110560).

Almost surely, 2^128875290 is an apocalyptic number.

128875290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 128875290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163537920).

128875290 is an abundant number, since it is smaller than the sum of its proper divisors (198200550).

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

128875290 is a wasteful number, since it uses less digits than its factorization.

128875290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1067.

The product of its (nonzero) digits is 80640, while the sum is 42.

The square root of 128875290 is about 11352.3253124635. The cubic root of 128875290 is about 505.1145575486.

The spelling of 128875290 in words is "one hundred twenty-eight million, eight hundred seventy-five thousand, two hundred ninety".