128816418 has 32 divisors (see below), whose sum is σ = 261169920. Its totient is φ = 42353280.

The previous prime is 128816417. The next prime is 128816423. The reversal of 128816418 is 814618821.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (128816417) 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, 281646 + ... + 282102.

It is an arithmetic number, because the mean of its divisors is an integer number (8161560).

Almost surely, 2^128816418 is an apocalyptic number.

128816418 is an abundant number, since it is smaller than the sum of its proper divisors (132353502).

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

128816418 is a wasteful number, since it uses less digits than its factorization.

128816418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1002.

The product of its digits is 24576, while the sum is 39.

The square root of 128816418 is about 11349.7320673221. The cubic root of 128816418 is about 505.0376314146.

The spelling of 128816418 in words is "one hundred twenty-eight million, eight hundred sixteen thousand, four hundred eighteen".