680278326 has 64 divisors (see below), whose sum is σ = 1678537728. Its totient is φ = 178985088.

The previous prime is 680278309. The next prime is 680278349. The reversal of 680278326 is 623872086.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 273400 + ... + 275876.

It is an arithmetic number, because the mean of its divisors is an integer number (26227152).

Almost surely, 2^680278326 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 680278326, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (839268864).

680278326 is an abundant number, since it is smaller than the sum of its proper divisors (998259402).

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

680278326 is a wasteful number, since it uses less digits than its factorization.

680278326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3005.

The product of its (nonzero) digits is 193536, while the sum is 42.

The square root of 680278326 is about 26082.1457322821. The cubic root of 680278326 is about 879.4858937543.

The spelling of 680278326 in words is "six hundred eighty million, two hundred seventy-eight thousand, three hundred twenty-six".