681382 has 16 divisors (see below), whose sum is σ = 1118880. Its totient is φ = 309312.

The previous prime is 681371. The next prime is 681403. The reversal of 681382 is 283186.

681382 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 681382.

It is a congruent number.

It is an unprimeable number.

681382 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 7 ways as a sum of consecutive naturals, for example, 1719 + ... + 2077.

It is an arithmetic number, because the mean of its divisors is an integer number (69930).

2⁶⁸¹³⁸² is an apocalyptic number.

681382 is a deficient number, since it is larger than the sum of its proper divisors (437498).

681382 is a wasteful number, since it uses less digits than its factorization.

681382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447.

The product of its digits is 2304, while the sum is 28.

The square root of 681382 is about 825.4586603822. The cubic root of 681382 is about 87.9961258625.

The spelling of 681382 in words is "six hundred eighty-one thousand, three hundred eighty-two".