128507808 has 288 divisors, whose sum is σ = 427932288. Its totient is φ = 33454080.

The previous prime is 128507791. The next prime is 128507833. The reversal of 128507808 is 808705821.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3473166 + ... + 3473202.

It is an arithmetic number, because the mean of its divisors is an integer number (1485876).

Almost surely, 2^128507808 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 128507808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (213966144).

128507808 is an abundant number, since it is smaller than the sum of its proper divisors (299424480).

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

128507808 is a wasteful number, since it uses less digits than its factorization.

128507808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108 (or 89 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 39.

The square root of 128507808 is about 11336.1284396393. The cubic root of 128507808 is about 504.6339968005.

The spelling of 128507808 in words is "one hundred twenty-eight million, five hundred seven thousand, eight hundred eight".