128085340 has 24 divisors (see below), whose sum is σ = 274704192. Its totient is φ = 50143680.

The previous prime is 128085323. The next prime is 128085343. The reversal of 128085340 is 43580821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128085343) 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, 67191 + ... + 69070.

It is an arithmetic number, because the mean of its divisors is an integer number (11446008).

Almost surely, 2^128085340 is an apocalyptic number.

128085340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128085340 is an abundant number, since it is smaller than the sum of its proper divisors (146618852).

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

128085340 is a wasteful number, since it uses less digits than its factorization.

128085340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136317 (or 136315 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 128085340 is about 11317.4794013508. The cubic root of 128085340 is about 504.0803968076.

The spelling of 128085340 in words is "one hundred twenty-eight million, eighty-five thousand, three hundred forty".