128344867 has 24 divisors (see below), whose sum is σ = 162263040. Its totient is φ = 100835280.

The previous prime is 128344847. The next prime is 128344889. The reversal of 128344867 is 768443821.

It is not a de Polignac number, because 128344867 - 2⁷ = 128344739 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128344817) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26638 + ... + 31084.

It is an arithmetic number, because the mean of its divisors is an integer number (6760960).

Almost surely, 2^128344867 is an apocalyptic number.

128344867 is a deficient number, since it is larger than the sum of its proper divisors (33918173).

128344867 is a wasteful number, since it uses less digits than its factorization.

128344867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4511 (or 4504 counting only the distinct ones).

The product of its digits is 258048, while the sum is 43.

The square root of 128344867 is about 11328.9393590044. The cubic root of 128344867 is about 504.4206236564.

The spelling of 128344867 in words is "one hundred twenty-eight million, three hundred forty-four thousand, eight hundred sixty-seven".