128340280 has 16 divisors (see below), whose sum is σ = 288765720. Its totient is φ = 51336096.

The previous prime is 128340263. The next prime is 128340313. The reversal of 128340280 is 82043821.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1604214 + ... + 1604293.

Almost surely, 2^128340280 is an apocalyptic number.

128340280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128340280 is an abundant number, since it is smaller than the sum of its proper divisors (160425440).

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

128340280 is a wasteful number, since it uses less digits than its factorization.

128340280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3208518 (or 3208514 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 128340280 is about 11328.7369110594. The cubic root of 128340280 is about 504.4146143134.

The spelling of 128340280 in words is "one hundred twenty-eight million, three hundred forty thousand, two hundred eighty".