680286820 has 12 divisors (see below), whose sum is σ = 1428602364. Its totient is φ = 272114720.

The previous prime is 680286791. The next prime is 680286863. The reversal of 680286820 is 28682086.

It can be written as a sum of positive squares in 2 ways, for example, as 354267684 + 326019136 = 18822^2 + 18056^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17007151 + ... + 17007190.

It is an arithmetic number, because the mean of its divisors is an integer number (119050197).

Almost surely, 2^680286820 is an apocalyptic number.

It is an amenable number.

680286820 is an abundant number, since it is smaller than the sum of its proper divisors (748315544).

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

680286820 is a wasteful number, since it uses less digits than its factorization.

680286820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34014350 (or 34014348 counting only the distinct ones).

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

The square root of 680286820 is about 26082.3085634688. The cubic root of 680286820 is about 879.4895541787.

The spelling of 680286820 in words is "six hundred eighty million, two hundred eighty-six thousand, eight hundred twenty".