404686 has 4 divisors (see below), whose sum is σ = 607032. Its totient is φ = 202342.

The previous prime is 404671. The next prime is 404693. The reversal of 404686 is 686404.

It is a semiprime because it is the product of two primes.

It is a plaindrome in base 13.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101170 + ... + 101173.

It is an arithmetic number, because the mean of its divisors is an integer number (151758).

2⁴⁰⁴⁶⁸⁶ is an apocalyptic number.

404686 is a deficient number, since it is larger than the sum of its proper divisors (202346).

404686 is a wasteful number, since it uses less digits than its factorization.

404686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202345.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 404686 is about 636.1493535326. The cubic root of 404686 is about 73.9672365309.

The spelling of 404686 in words is "four hundred four thousand, six hundred eighty-six".