680243634 has 96 divisors (see below), whose sum is σ = 1714317696. Its totient is φ = 190944000.

The previous prime is 680243609. The next prime is 680243639. The reversal of 680243634 is 436342086.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (680243639) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2710009 + ... + 2710259.

It is an arithmetic number, because the mean of its divisors is an integer number (17857476).

Almost surely, 2^680243634 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 680243634, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (857158848).

680243634 is an abundant number, since it is smaller than the sum of its proper divisors (1034074062).

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

680243634 is a wasteful number, since it uses less digits than its factorization.

680243634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560 (or 557 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 36.

The square root of 680243634 is about 26081.4806711582. The cubic root of 680243634 is about 879.4709431858.

The spelling of 680243634 in words is "six hundred eighty million, two hundred forty-three thousand, six hundred thirty-four".