681876 has 72 divisors (see below), whose sum is σ = 1956864. Its totient is φ = 198720.

The previous prime is 681841. The next prime is 681883. The reversal of 681876 is 678186.

681876 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

Its product of digits (16128) is a multiple of the sum of its prime divisors (96).

It is a self number, because there is not a number n which added to its sum of digits gives 681876.

It is a congruent number.

It is an unprimeable number.

681876 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14485 + ... + 14531.

2⁶⁸¹⁸⁷⁶ 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 681876, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (978432).

681876 is an abundant number, since it is smaller than the sum of its proper divisors (1274988).

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

681876 is a wasteful number, since it uses less digits than its factorization.

681876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101 (or 96 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 681876 is about 825.7578337503. The cubic root of 681876 is about 88.0173863719.

The spelling of 681876 in words is "six hundred eighty-one thousand, eight hundred seventy-six".