680940582 has 96 divisors (see below), whose sum is σ = 1663183872. Its totient is φ = 182020608.

The previous prime is 680940581. The next prime is 680940607. The reversal of 680940582 is 285049086.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680940581) 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, 1470483 + ... + 1470945.

It is an arithmetic number, because the mean of its divisors is an integer number (17324832).

Almost surely, 2^680940582 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 680940582, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (831591936).

680940582 is an abundant number, since it is smaller than the sum of its proper divisors (982243290).

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

680940582 is a wasteful number, since it uses less digits than its factorization.

680940582 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610 (or 591 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 680940582 is about 26094.8382252123. The cubic root of 680940582 is about 879.7711965415.

The spelling of 680940582 in words is "six hundred eighty million, nine hundred forty thousand, five hundred eighty-two".