128646680 has 32 divisors (see below), whose sum is σ = 292950000. Its totient is φ = 50837376.

The previous prime is 128646671. The next prime is 128646689. The reversal of 128646680 is 86646821.

It is an interprime number because it is at equal distance from previous prime (128646671) and next prime (128646689).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128646689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16055 + ... + 22694.

Almost surely, 2^128646680 is an apocalyptic number.

128646680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128646680 is an abundant number, since it is smaller than the sum of its proper divisors (164303320).

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

128646680 is a wasteful number, since it uses less digits than its factorization.

128646680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38843 (or 38839 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 41.

The square root of 128646680 is about 11342.2519809780. The cubic root of 128646680 is about 504.8157089855.

The spelling of 128646680 in words is "one hundred twenty-eight million, six hundred forty-six thousand, six hundred eighty".