128043867 has 16 divisors (see below), whose sum is σ = 195759872. Its totient is φ = 72925920.

The previous prime is 128043859. The next prime is 128043871. The reversal of 128043867 is 768340821.

It is not a de Polignac number, because 128043867 - 2³ = 128043859 is a prime.

It is a super-3 number, since 3×128043867³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (128043827) 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, 3484 + ... + 16377.

It is an arithmetic number, because the mean of its divisors is an integer number (12234992).

Almost surely, 2^128043867 is an apocalyptic number.

128043867 is a deficient number, since it is larger than the sum of its proper divisors (67716005).

128043867 is a wasteful number, since it uses less digits than its factorization.

128043867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20178.

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 128043867 is about 11315.6469987359. The cubic root of 128043867 is about 504.0259852123.

The spelling of 128043867 in words is "one hundred twenty-eight million, forty-three thousand, eight hundred sixty-seven".