128178345 has 16 divisors (see below), whose sum is σ = 206317440. Its totient is φ = 67951104.

The previous prime is 128178343. The next prime is 128178361. The reversal of 128178345 is 543871821.

It is not a de Polignac number, because 128178345 - 2¹ = 128178343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128178343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23080 + ... + 28089.

It is an arithmetic number, because the mean of its divisors is an integer number (12894840).

Almost surely, 2^128178345 is an apocalyptic number.

128178345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

128178345 is a deficient number, since it is larger than the sum of its proper divisors (78139095).

128178345 is a wasteful number, since it uses less digits than its factorization.

128178345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51344.

The product of its digits is 53760, while the sum is 39.

The square root of 128178345 is about 11321.5875653550. The cubic root of 128178345 is about 504.2023744792.

Adding to 128178345 its product of digits (53760), we get a triangular number (128232105 = T₁₆₀₁₄).

The spelling of 128178345 in words is "one hundred twenty-eight million, one hundred seventy-eight thousand, three hundred forty-five".