680820810 has 32 divisors (see below), whose sum is σ = 1634694912. Its totient is φ = 181471680.

The previous prime is 680820809. The next prime is 680820827. The reversal of 680820810 is 18028086.

It is a super-2 number, since 2×680820810² = 927033950658112200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98880 + ... + 105540.

It is an arithmetic number, because the mean of its divisors is an integer number (51084216).

Almost surely, 2^680820810 is an apocalyptic number.

680820810 is an abundant number, since it is smaller than the sum of its proper divisors (953874102).

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

680820810 is a wasteful number, since it uses less digits than its factorization.

680820810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10078.

The product of its (nonzero) digits is 6144, while the sum is 33.

The square root of 680820810 is about 26092.5431876619. The cubic root of 680820810 is about 879.7196119456.

Adding to 680820810 its reverse (18028086), we get a palindrome (698848896).

The spelling of 680820810 in words is "six hundred eighty million, eight hundred twenty thousand, eight hundred ten".