128685260 has 48 divisors (see below), whose sum is σ = 302793120. Its totient is φ = 45527040.

The previous prime is 128685241. The next prime is 128685287. The reversal of 128685260 is 62586821.

It is a super-2 number, since 2×128685260² = 33119792282535200, which contains 22 as substring.

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, 236 + ... + 16044.

It is an arithmetic number, because the mean of its divisors is an integer number (6308190).

Almost surely, 2^128685260 is an apocalyptic number.

128685260 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 128685260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151396560).

128685260 is an abundant number, since it is smaller than the sum of its proper divisors (174107860).

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

128685260 is a wasteful number, since it uses less digits than its factorization.

128685260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15866 (or 15864 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 128685260 is about 11343.9525739488. The cubic root of 128685260 is about 504.8661671952.

The spelling of 128685260 in words is "one hundred twenty-eight million, six hundred eighty-five thousand, two hundred sixty".