406684 has 12 divisors (see below), whose sum is σ = 716184. Its totient is φ = 202064.

The previous prime is 406673. The next prime is 406697. The reversal of 406684 is 486604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 999 + ... + 1345.

It is an arithmetic number, because the mean of its divisors is an integer number (59682).

2⁴⁰⁶⁶⁸⁴ is an apocalyptic number.

It is an amenable number.

406684 is a deficient number, since it is larger than the sum of its proper divisors (309500).

406684 is a wasteful number, since it uses less digits than its factorization.

406684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644 (or 642 counting only the distinct ones).

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

The square root of 406684 is about 637.7178059299. The cubic root of 406684 is about 74.0887661351.

It can be divided in two parts, 40 and 6684, that added together give a square (6724 = 82²).

The spelling of 406684 in words is "four hundred six thousand, six hundred eighty-four".