128684070 has 48 divisors (see below), whose sum is σ = 335443680. Its totient is φ = 34227072.

The previous prime is 128684029. The next prime is 128684071. The reversal of 128684070 is 70486821.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128684071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37882 + ... + 41138.

It is an arithmetic number, because the mean of its divisors is an integer number (6988410).

Almost surely, 2^128684070 is an apocalyptic number.

128684070 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128684070 is an abundant number, since it is smaller than the sum of its proper divisors (206759610).

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

128684070 is a wasteful number, since it uses less digits than its factorization.

128684070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3709 (or 3706 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 128684070 is about 11343.9001229736. The cubic root of 128684070 is about 504.8646109626.

The spelling of 128684070 in words is "one hundred twenty-eight million, six hundred eighty-four thousand, seventy".