684957084 has 72 divisors (see below), whose sum is σ = 1863968400. Its totient is φ = 195197184.

The previous prime is 684957073. The next prime is 684957109. The reversal of 684957084 is 480759486.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 267442 + ... + 269990.

It is an arithmetic number, because the mean of its divisors is an integer number (25888450).

Almost surely, 2^684957084 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 684957084, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (931984200).

684957084 is an abundant number, since it is smaller than the sum of its proper divisors (1179011316).

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

684957084 is a wasteful number, since it uses less digits than its factorization.

684957084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3027 (or 3018 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 51.

The square root of 684957084 is about 26171.6847757266. The cubic root of 684957084 is about 881.4975722510.

The spelling of 684957084 in words is "six hundred eighty-four million, nine hundred fifty-seven thousand, eighty-four".