128811960 has 192 divisors, whose sum is σ = 447482880. Its totient is φ = 32060160.

The previous prime is 128811959. The next prime is 128811971. The reversal of 128811960 is 69118821.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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, 388995 + ... + 389325.

It is an arithmetic number, because the mean of its divisors is an integer number (2330640).

Almost surely, 2^128811960 is an apocalyptic number.

128811960 is a gapful number since it is divisible by the number (10) 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 128811960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (223741440).

128811960 is an abundant number, since it is smaller than the sum of its proper divisors (318670920).

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

128811960 is a wasteful number, since it uses less digits than its factorization.

128811960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418 (or 411 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 36.

The square root of 128811960 is about 11349.5356733216. The cubic root of 128811960 is about 505.0318053360.

It can be divided in two parts, 12881 and 1960, that added together give a palindrome (14841).

The spelling of 128811960 in words is "one hundred twenty-eight million, eight hundred eleven thousand, nine hundred sixty".