128008776 has 192 divisors, whose sum is σ = 416145600. Its totient is φ = 32514048.

The previous prime is 128008753. The next prime is 128008781. The reversal of 128008776 is 677800821.

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, 379680 + ... + 380016.

It is an arithmetic number, because the mean of its divisors is an integer number (2167425).

Almost surely, 2^128008776 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 128008776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (208072800).

128008776 is an abundant number, since it is smaller than the sum of its proper divisors (288136824).

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

128008776 is a wasteful number, since it uses less digits than its factorization.

128008776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396 (or 385 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 39.

The square root of 128008776 is about 11314.0963404065. The cubic root of 128008776 is about 503.9799374730.

The spelling of 128008776 in words is "one hundred twenty-eight million, eight thousand, seven hundred seventy-six".