404888409 has 16 divisors (see below), whose sum is σ = 612599040. Its totient is φ = 264181680.

The previous prime is 404888369. The next prime is 404888411. The reversal of 404888409 is 904888404.

It is not a de Polignac number, because 404888409 - 2¹⁵ = 404855641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (404888479) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 158262 + ... + 160799.

It is an arithmetic number, because the mean of its divisors is an integer number (38287440).

Almost surely, 2^404888409 is an apocalyptic number.

It is an amenable number.

404888409 is a deficient number, since it is larger than the sum of its proper divisors (207710631).

404888409 is a wasteful number, since it uses less digits than its factorization.

404888409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319117 (or 319111 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 45.

The square root of 404888409 is about 20121.8391058074. The cubic root of 404888409 is about 739.7956636938.

The spelling of 404888409 in words is "four hundred four million, eight hundred eighty-eight thousand, four hundred nine".