684888 has 16 divisors (see below), whose sum is σ = 1712280. Its totient is φ = 228288.

The previous prime is 684869. The next prime is 684889. The reversal of 684888 is 888486.

684888 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nude number because it is divisible by every one of its digits.

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 684888.

It is not an unprimeable number, because it can be changed into a prime (684889) by changing a digit.

684888 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14245 + ... + 14292.

2⁶⁸⁴⁸⁸⁸ is an apocalyptic number.

It is an amenable number.

684888 is an abundant number, since it is smaller than the sum of its proper divisors (1027392).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

684888 is a wasteful number, since it uses less digits than its factorization.

684888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28546 (or 28542 counting only the distinct ones).

The product of its digits is 98304, while the sum is 42.

The square root of 684888 is about 827.5796034219. The cubic root of 684888 is about 88.1467935637.

The spelling of 684888 in words is "six hundred eighty-four thousand, eight hundred eighty-eight".