404287 has 8 divisors (see below), whose sum is σ = 440496. Its totient is φ = 368832.

The previous prime is 404273. The next prime is 404291. The reversal of 404287 is 782404.

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

It is a cyclic number.

It is not a de Polignac number, because 404287 - 2¹¹ = 402239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1668 + ... + 1894.

It is an arithmetic number, because the mean of its divisors is an integer number (55062).

2⁴⁰⁴²⁸⁷ is an apocalyptic number.

404287 is a deficient number, since it is larger than the sum of its proper divisors (36209).

404287 is a wasteful number, since it uses less digits than its factorization.

404287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377.

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 404287 is about 635.8356705942. The cubic root of 404287 is about 73.9429192149.

The spelling of 404287 in words is "four hundred four thousand, two hundred eighty-seven".