128307684 has 24 divisors (see below), whose sum is σ = 315142240. Its totient is φ = 40518144.

The previous prime is 128307679. The next prime is 128307689. The reversal of 128307684 is 486703821.

It is an interprime number because it is at equal distance from previous prime (128307679) and next prime (128307689).

It is not an unprimeable number, because it can be changed into a prime (128307689) 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, 281149 + ... + 281604.

Almost surely, 2^128307684 is an apocalyptic number.

It is an amenable number.

128307684 is an abundant number, since it is smaller than the sum of its proper divisors (186834556).

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

128307684 is a wasteful number, since it uses less digits than its factorization.

128307684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562779 (or 562777 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 128307684 is about 11327.2981774119. The cubic root of 128307684 is about 504.3719067786.

The spelling of 128307684 in words is "one hundred twenty-eight million, three hundred seven thousand, six hundred eighty-four".