684430 has 8 divisors (see below), whose sum is σ = 1231992. Its totient is φ = 273768.

The previous prime is 684427. The next prime is 684433. The reversal of 684430 is 34486.

684430 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (684427) and next prime (684433).

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

It is a junction number, because it is equal to n+sod(n) for n = 684395 and 684404.

It is a congruent number.

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, 34212 + ... + 34231.

It is an arithmetic number, because the mean of its divisors is an integer number (153999).

2⁶⁸⁴⁴³⁰ is an apocalyptic number.

684430 is a deficient number, since it is larger than the sum of its proper divisors (547562).

684430 is a wasteful number, since it uses less digits than its factorization.

684430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68450.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 684430 is about 827.3028466046. The cubic root of 684430 is about 88.1271406016.

The spelling of 684430 in words is "six hundred eighty-four thousand, four hundred thirty".