128788044 has 72 divisors (see below), whose sum is σ = 377524224. Its totient is φ = 33448800.

The previous prime is 128788031. The next prime is 128788081. The reversal of 128788044 is 440887821.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a zygodrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 128787987 and 128788005.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3829 + ... + 16499.

It is an arithmetic number, because the mean of its divisors is an integer number (5243392).

Almost surely, 2^128788044 is an apocalyptic number.

128788044 is a gapful number since it is divisible by the number (14) 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 128788044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188762112).

128788044 is an abundant number, since it is smaller than the sum of its proper divisors (248736180).

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

128788044 is a wasteful number, since it uses less digits than its factorization.

128788044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12707 (or 12694 counting only the distinct ones).

The product of its (nonzero) digits is 114688, while the sum is 42.

The square root of 128788044 is about 11348.4820130271. The cubic root of 128788044 is about 505.0005476581. Note that the first 3 decimals are identical.

The spelling of 128788044 in words is "one hundred twenty-eight million, seven hundred eighty-eight thousand, forty-four".