684810428 has 12 divisors (see below), whose sum is σ = 1198731240. Its totient is φ = 342315792.

The previous prime is 684810421. The next prime is 684810431. The reversal of 684810428 is 824018486.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684810421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3326 + ... + 37157.

It is an arithmetic number, because the mean of its divisors is an integer number (99894270).

Almost surely, 2^684810428 is an apocalyptic number.

It is an amenable number.

684810428 is a deficient number, since it is larger than the sum of its proper divisors (513920812).

684810428 is a wasteful number, since it uses less digits than its factorization.

684810428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44716 (or 44714 counting only the distinct ones).

The product of its (nonzero) digits is 98304, while the sum is 41.

The square root of 684810428 is about 26168.8828191041. The cubic root of 684810428 is about 881.4346553479.

The spelling of 684810428 in words is "six hundred eighty-four million, eight hundred ten thousand, four hundred twenty-eight".