684058788 has 72 divisors (see below), whose sum is σ = 2001242880. Its totient is φ = 192965760.

The previous prime is 684058787. The next prime is 684058789. The reversal of 684058788 is 887850486.

It is an interprime number because it is at equal distance from previous prime (684058787) and next prime (684058789).

It is not an unprimeable number, because it can be changed into a prime (684058787) 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 23 ways as a sum of consecutive naturals, for example, 2728 + ... + 37088.

It is an arithmetic number, because the mean of its divisors is an integer number (27795040).

Almost surely, 2^684058788 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 684058788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1000621440).

684058788 is an abundant number, since it is smaller than the sum of its proper divisors (1317184092).

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

684058788 is a wasteful number, since it uses less digits than its factorization.

684058788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34457 (or 34452 counting only the distinct ones).

The product of its (nonzero) digits is 3440640, while the sum is 54.

The square root of 684058788 is about 26154.5175447761. The cubic root of 684058788 is about 881.1120531322.

The spelling of 684058788 in words is "six hundred eighty-four million, fifty-eight thousand, seven hundred eighty-eight".