404289 has 12 divisors (see below), whose sum is σ = 604500. Its totient is φ = 260064.

The previous prime is 404273. The next prime is 404291. The reversal of 404289 is 982404.

It can be written as a sum of positive squares in 2 ways, for example, as 173889 + 230400 = 417^2 + 480^2 .

It is not a de Polignac number, because 404289 - 2⁴ = 404273 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (404249) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 514 + ... + 1035.

It is an arithmetic number, because the mean of its divisors is an integer number (50375).

2⁴⁰⁴²⁸⁹ is an apocalyptic number.

It is an amenable number.

404289 is a deficient number, since it is larger than the sum of its proper divisors (200211).

404289 is a wasteful number, since it uses less digits than its factorization.

404289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1584 (or 1581 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 404289 is about 635.8372433257. The cubic root of 404289 is about 73.9430411461.

The spelling of 404289 in words is "four hundred four thousand, two hundred eighty-nine".