684436 has 12 divisors (see below), whose sum is σ = 1207360. Its totient is φ = 339480.

The previous prime is 684433. The next prime is 684443. The reversal of 684436 is 634486.

It is a junction number, because it is equal to n+sod(n) for n = 684398 and 684407.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 684436.

It is not an unprimeable number, because it can be changed into a prime (684433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60 + ... + 1171.

2⁶⁸⁴⁴³⁶ is an apocalyptic number.

It is an amenable number.

684436 is a deficient number, since it is larger than the sum of its proper divisors (522924).

684436 is a wasteful number, since it uses less digits than its factorization.

684436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1374 (or 1372 counting only the distinct ones).

The product of its digits is 13824, while the sum is 31.

The square root of 684436 is about 827.3064728382. The cubic root of 684436 is about 88.1273981206.

The spelling of 684436 in words is "six hundred eighty-four thousand, four hundred thirty-six".