404388489 has 8 divisors (see below), whose sum is σ = 539775040. Its totient is φ = 269297136.

The previous prime is 404388473. The next prime is 404388539. The reversal of 404388489 is 984883404.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 404388489 - 2⁴ = 404388473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (404388449) 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 7 ways as a sum of consecutive naturals, for example, 70582 + ... + 76095.

It is an arithmetic number, because the mean of its divisors is an integer number (67471880).

Almost surely, 2^404388489 is an apocalyptic number.

It is an amenable number.

404388489 is a deficient number, since it is larger than the sum of its proper divisors (135386551).

404388489 is a wasteful number, since it uses less digits than its factorization.

404388489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147599.

The product of its (nonzero) digits is 884736, while the sum is 48.

The square root of 404388489 is about 20109.4129451856. The cubic root of 404388489 is about 739.4910604508.

The spelling of 404388489 in words is "four hundred four million, three hundred eighty-eight thousand, four hundred eighty-nine".