684000834 has 16 divisors (see below), whose sum is σ = 1492365600. Its totient is φ = 207272960.

The previous prime is 684000829. The next prime is 684000883. The reversal of 684000834 is 438000486.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 684000795 and 684000804.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5181759 + ... + 5181890.

It is an arithmetic number, because the mean of its divisors is an integer number (93272850).

Almost surely, 2^684000834 is an apocalyptic number.

684000834 is an abundant number, since it is smaller than the sum of its proper divisors (808364766).

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

684000834 is a wasteful number, since it uses less digits than its factorization.

684000834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10363665.

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 684000834 is about 26153.4096056327. The cubic root of 684000834 is about 881.0871695934.

Multiplying 684000834 by its sum of digits (33), we get a palindrome (22572027522).

The spelling of 684000834 in words is "six hundred eighty-four million, eight hundred thirty-four", and thus it is an aban number.