404587 has 6 divisors (see below), whose sum is σ = 418308. Its totient is φ = 391104.

The previous prime is 404557. The next prime is 404597. The reversal of 404587 is 785404.

It is a de Polignac number, because none of the positive numbers 2^k-404587 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (404507) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4123 + ... + 4219.

It is an arithmetic number, because the mean of its divisors is an integer number (69718).

2⁴⁰⁴⁵⁸⁷ is an apocalyptic number.

404587 is a deficient number, since it is larger than the sum of its proper divisors (13721).

404587 is an frugal number, since it uses more digits than its factorization.

404587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237 (or 140 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 404587 is about 636.0715368573. The cubic root of 404587 is about 73.9612044026.

The spelling of 404587 in words is "four hundred four thousand, five hundred eighty-seven".