404478001 has 4 divisors (see below), whose sum is σ = 407054452. Its totient is φ = 401901552.

The previous prime is 404477999. The next prime is 404478017. The reversal of 404478001 is 100874404.

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

It can be written as a sum of positive squares in 2 ways, for example, as 38750625 + 365727376 = 6225^2 + 19124^2 .

It is a cyclic number.

It is not a de Polignac number, because 404478001 - 2¹ = 404477999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (404478071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1287990 + ... + 1288303.

It is an arithmetic number, because the mean of its divisors is an integer number (101763613).

Almost surely, 2^404478001 is an apocalyptic number.

It is an amenable number.

404478001 is a deficient number, since it is larger than the sum of its proper divisors (2576451).

404478001 is a wasteful number, since it uses less digits than its factorization.

404478001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2576450.

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 404478001 is about 20111.6384464320. The cubic root of 404478001 is about 739.5456189115.

The spelling of 404478001 in words is "four hundred four million, four hundred seventy-eight thousand, one".