404990401 has 4 divisors (see below), whose sum is σ = 405222400. Its totient is φ = 404758404.

The previous prime is 404990389. The next prime is 404990441. The reversal of 404990401 is 104099404.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 404990401 - 2⁹ = 404989889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (404990441) 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, 113361 + ... + 116878.

It is an arithmetic number, because the mean of its divisors is an integer number (101305600).

Almost surely, 2^404990401 is an apocalyptic number.

It is an amenable number.

404990401 is a deficient number, since it is larger than the sum of its proper divisors (231999).

404990401 is a wasteful number, since it uses less digits than its factorization.

404990401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231998.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 404990401 is about 20124.3733070126. The cubic root of 404990401 is about 739.8577770259.

The spelling of 404990401 in words is "four hundred four million, nine hundred ninety thousand, four hundred one".