684089084 has 12 divisors (see below), whose sum is σ = 1368178224. Its totient is φ = 293181024.

The previous prime is 684089083. The next prime is 684089093. The reversal of 684089084 is 480980486.

684089084 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684089083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12215849 + ... + 12215904.

It is an arithmetic number, because the mean of its divisors is an integer number (114014852).

Almost surely, 2^684089084 is an apocalyptic number.

It is an amenable number.

684089084 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

684089084 is a wasteful number, since it uses less digits than its factorization.

684089084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24431764 (or 24431762 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 47.

The square root of 684089084 is about 26155.0967117310. The cubic root of 684089084 is about 881.1250606773.

The spelling of 684089084 in words is "six hundred eighty-four million, eighty-nine thousand, eighty-four".