681848320 has 80 divisors (see below), whose sum is σ = 1655050320. Its totient is φ = 269369344.

The previous prime is 681848311. The next prime is 681848329. The reversal of 681848320 is 23848186.

It is an interprime number because it is at equal distance from previous prime (681848311) and next prime (681848329).

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681848329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210876 + ... + 214084.

It is an arithmetic number, because the mean of its divisors is an integer number (20688129).

Almost surely, 2^681848320 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 681848320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (827525160).

681848320 is an abundant number, since it is smaller than the sum of its proper divisors (973202000).

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

681848320 is an equidigital number, since it uses as much as digits as its factorization.

681848320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3315 (or 3299 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 40.

The square root of 681848320 is about 26112.2254892225. The cubic root of 681848320 is about 880.1619536636.

The spelling of 681848320 in words is "six hundred eighty-one million, eight hundred forty-eight thousand, three hundred twenty".