128777488 has 60 divisors (see below), whose sum is σ = 293887440. Its totient is φ = 54497856.

The previous prime is 128777479. The next prime is 128777489. The reversal of 128777488 is 884777821.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (128777489) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64083 + ... + 66061.

It is an arithmetic number, because the mean of its divisors is an integer number (4898124).

Almost surely, 2^128777488 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 128777488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146943720).

128777488 is an abundant number, since it is smaller than the sum of its proper divisors (165109952).

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

128777488 is a wasteful number, since it uses less digits than its factorization.

128777488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2084 (or 2071 counting only the distinct ones).

The product of its digits is 1404928, while the sum is 52.

The square root of 128777488 is about 11348.0169192683. The cubic root of 128777488 is about 504.9867499709.

The spelling of 128777488 in words is "one hundred twenty-eight million, seven hundred seventy-seven thousand, four hundred eighty-eight".