128216560 has 80 divisors (see below), whose sum is σ = 318729600. Its totient is φ = 47824128.

The previous prime is 128216531. The next prime is 128216603. The reversal of 128216560 is 65612821.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101211 + ... + 102469.

It is an arithmetic number, because the mean of its divisors is an integer number (3984120).

Almost surely, 2^128216560 is an apocalyptic number.

128216560 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 128216560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159364800).

128216560 is an abundant number, since it is smaller than the sum of its proper divisors (190513040).

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

128216560 is a wasteful number, since it uses less digits than its factorization.

128216560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1358 (or 1352 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 128216560 is about 11323.2751445860. The cubic root of 128216560 is about 504.2524770120.

The spelling of 128216560 in words is "one hundred twenty-eight million, two hundred sixteen thousand, five hundred sixty".