681378 has 32 divisors (see below), whose sum is σ = 1478400. Its totient is φ = 208656.

The previous prime is 681371. The next prime is 681403. The reversal of 681378 is 873186.

681378 is nontrivially palindromic in base 8.

It is not an unprimeable number, because it can be changed into a prime (681371) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4833 + ... + 4971.

It is an arithmetic number, because the mean of its divisors is an integer number (46200).

2⁶⁸¹³⁷⁸ is an apocalyptic number.

681378 is an abundant number, since it is smaller than the sum of its proper divisors (797022).

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

681378 is a wasteful number, since it uses less digits than its factorization.

681378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206.

The product of its digits is 8064, while the sum is 33.

The square root of 681378 is about 825.4562374832. The cubic root of 681378 is about 87.9959536707.

The spelling of 681378 in words is "six hundred eighty-one thousand, three hundred seventy-eight".