680788446 has 48 divisors (see below), whose sum is σ = 1478030976. Its totient is φ = 208953888.

The previous prime is 680788441. The next prime is 680788457. The reversal of 680788446 is 644887086.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680788441) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 692071 + ... + 693053.

It is an arithmetic number, because the mean of its divisors is an integer number (30792312).

Almost surely, 2^680788446 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 680788446, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (739015488).

680788446 is an abundant number, since it is smaller than the sum of its proper divisors (797242530).

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

680788446 is a wasteful number, since it uses less digits than its factorization.

680788446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1697 (or 1684 counting only the distinct ones).

The product of its (nonzero) digits is 2064384, while the sum is 51.

The square root of 680788446 is about 26091.9230031058. The cubic root of 680788446 is about 879.7056720580.

The spelling of 680788446 in words is "six hundred eighty million, seven hundred eighty-eight thousand, four hundred forty-six".