128034885 has 32 divisors (see below), whose sum is σ = 224005248. Its totient is φ = 61931520.

The previous prime is 128034883. The next prime is 128034899. The reversal of 128034885 is 588430821.

It is not a de Polignac number, because 128034885 - 2¹ = 128034883 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128034883) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 110469 + ... + 111621.

It is an arithmetic number, because the mean of its divisors is an integer number (7000164).

Almost surely, 2^128034885 is an apocalyptic number.

128034885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

128034885 is a deficient number, since it is larger than the sum of its proper divisors (95970363).

128034885 is a wasteful number, since it uses less digits than its factorization.

128034885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1845.

The product of its (nonzero) digits is 61440, while the sum is 39.

The square root of 128034885 is about 11315.2501077086. The cubic root of 128034885 is about 504.0141994929.

The spelling of 128034885 in words is "one hundred twenty-eight million, thirty-four thousand, eight hundred eighty-five".