680742042 has 8 divisors (see below), whose sum is σ = 1361484096. Its totient is φ = 226914012.

The previous prime is 680742019. The next prime is 680742053. The reversal of 680742042 is 240247086.

It is a sphenic number, since it is the product of 3 distinct primes.

680742042 is an admirable number.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 680741994 and 680742012.

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 3 ways as a sum of consecutive naturals, for example, 56728498 + ... + 56728509.

It is an arithmetic number, because the mean of its divisors is an integer number (170185512).

Almost surely, 2^680742042 is an apocalyptic number.

680742042 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

680742042 is a wasteful number, since it uses less digits than its factorization.

680742042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113457012.

The product of its (nonzero) digits is 21504, while the sum is 33.

The square root of 680742042 is about 26091.0337472473. The cubic root of 680742042 is about 879.6856840623.

The spelling of 680742042 in words is "six hundred eighty million, seven hundred forty-two thousand, forty-two".