404128067 has 4 divisors (see below), whose sum is σ = 461860656. Its totient is φ = 346395480.

The previous prime is 404128033. The next prime is 404128069. The reversal of 404128067 is 760821404.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 404128067 - 2⁶ = 404128003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (404128069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28866284 + ... + 28866297.

It is an arithmetic number, because the mean of its divisors is an integer number (115465164).

Almost surely, 2^404128067 is an apocalyptic number.

404128067 is a deficient number, since it is larger than the sum of its proper divisors (57732589).

404128067 is an equidigital number, since it uses as much as digits as its factorization.

404128067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57732588.

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 404128067 is about 20102.9367755062. The cubic root of 404128067 is about 739.3322848338.

The spelling of 404128067 in words is "four hundred four million, one hundred twenty-eight thousand, sixty-seven".