405694 has 8 divisors (see below), whose sum is σ = 617328. Its totient is φ = 199920.

The previous prime is 405689. The next prime is 405701. The reversal of 405694 is 496504.

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

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, 1287 + ... + 1570.

It is an arithmetic number, because the mean of its divisors is an integer number (77166).

2⁴⁰⁵⁶⁹⁴ is an apocalyptic number.

405694 is a deficient number, since it is larger than the sum of its proper divisors (211634).

405694 is a wasteful number, since it uses less digits than its factorization.

405694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2930.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 405694 is about 636.9411275777. The cubic root of 405694 is about 74.0285986369.

Adding to 405694 its product of nonzero digits (4320), we get a palindrome (410014).

The spelling of 405694 in words is "four hundred five thousand, six hundred ninety-four".