680494386 has 120 divisors (see below), whose sum is σ = 1697547024. Its totient is φ = 180329760.

The previous prime is 680494379. The next prime is 680494403. The reversal of 680494386 is 683494086.

It is a Curzon 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 59 ways as a sum of consecutive naturals, for example, 35815485 + ... + 35815503.

Almost surely, 2^680494386 is an apocalyptic number.

680494386 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 680494386, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (848773512).

680494386 is an abundant number, since it is smaller than the sum of its proper divisors (1017052638).

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

680494386 is a wasteful number, since it uses less digits than its factorization.

680494386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106 (or 48 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 48.

The square root of 680494386 is about 26086.2873172861. The cubic root of 680494386 is about 879.5789936916.

The spelling of 680494386 in words is "six hundred eighty million, four hundred ninety-four thousand, three hundred eighty-six".