134128404 has 72 divisors (see below), whose sum is σ = 352010568. Its totient is φ = 43027200.

The previous prime is 134128403. The next prime is 134128409. The reversal of 134128404 is 404821431.

134128404 is a `hidden beast` number, since 134 + 128 + 404 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 108118404 + 26010000 = 10398^2 + 5100^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134128403) 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, 134034 + ... + 135030.

Almost surely, 2^134128404 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 134128404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176005284).

134128404 is an abundant number, since it is smaller than the sum of its proper divisors (217882164).

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

134128404 is a wasteful number, since it uses less digits than its factorization.

134128404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1145 (or 1140 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 134128404 is about 11581.3817828444. The cubic root of 134128404 is about 511.8863934544.

Adding to 134128404 its reverse (404821431), we get a palindrome (538949835).

The spelling of 134128404 in words is "one hundred thirty-four million, one hundred twenty-eight thousand, four hundred four".