128297208 has 128 divisors (see below), whose sum is σ = 361025280. Its totient is φ = 37739520.

The previous prime is 128297203. The next prime is 128297219. The reversal of 128297208 is 802792821.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128297203) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 979303 + ... + 979433.

It is an arithmetic number, because the mean of its divisors is an integer number (2820510).

Almost surely, 2^128297208 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128297208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (180512640).

128297208 is an abundant number, since it is smaller than the sum of its proper divisors (232728072).

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

128297208 is a wasteful number, since it uses less digits than its factorization.

128297208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269 (or 265 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 128297208 is about 11326.8357452556. The cubic root of 128297208 is about 504.3581795054.

The spelling of 128297208 in words is "one hundred twenty-eight million, two hundred ninety-seven thousand, two hundred eight".