128682140 has 48 divisors (see below), whose sum is σ = 275903712. Its totient is φ = 50405376.

The previous prime is 128682133. The next prime is 128682221. The reversal of 128682140 is 41286821.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 128682097 and 128682106.

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, 218927 + ... + 219513.

It is an arithmetic number, because the mean of its divisors is an integer number (5747994).

Almost surely, 2^128682140 is an apocalyptic number.

128682140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128682140 is an abundant number, since it is smaller than the sum of its proper divisors (147221572).

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

128682140 is a wasteful number, since it uses less digits than its factorization.

128682140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 806 (or 804 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 128682140 is about 11343.8150549099. The cubic root of 128682140 is about 504.8620869684.

The spelling of 128682140 in words is "one hundred twenty-eight million, six hundred eighty-two thousand, one hundred forty".