128873808 has 160 divisors (see below), whose sum is σ = 445209600. Its totient is φ = 34867584.

The previous prime is 128873803. The next prime is 128873813. The reversal of 128873808 is 808378821.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (128873803) and next prime (128873813).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128873803) 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, 56335 + ... + 58577.

It is an arithmetic number, because the mean of its divisors is an integer number (2782560).

Almost surely, 2^128873808 is an apocalyptic number.

128873808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128873808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222604800).

128873808 is an abundant number, since it is smaller than the sum of its proper divisors (316335792).

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

128873808 is a wasteful number, since it uses less digits than its factorization.

128873808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2286 (or 2274 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 45.

The square root of 128873808 is about 11352.2600393049. The cubic root of 128873808 is about 505.1126213547.

The spelling of 128873808 in words is "one hundred twenty-eight million, eight hundred seventy-three thousand, eight hundred eight".