684980712 has 320 divisors, whose sum is σ = 2218191360. Its totient is φ = 195955200.

The previous prime is 684980707. The next prime is 684980717. The reversal of 684980712 is 217089486.

It is an interprime number because it is at equal distance from previous prime (684980707) and next prime (684980717).

It is not an unprimeable number, because it can be changed into a prime (684980717) 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 79 ways as a sum of consecutive naturals, for example, 11229162 + ... + 11229222.

It is an arithmetic number, because the mean of its divisors is an integer number (6931848).

Almost surely, 2^684980712 is an apocalyptic number.

684980712 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 684980712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1109095680).

684980712 is an abundant number, since it is smaller than the sum of its proper divisors (1533210648).

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

684980712 is a wasteful number, since it uses less digits than its factorization.

684980712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166 (or 153 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 684980712 is about 26172.1361757118. The cubic root of 684980712 is about 881.5077080613.

The spelling of 684980712 in words is "six hundred eighty-four million, nine hundred eighty thousand, seven hundred twelve".