680728845 has 16 divisors (see below), whose sum is σ = 1124301312. Its totient is φ = 351343680.

The previous prime is 680728823. The next prime is 680728847. The reversal of 680728845 is 548827086.

It is not a de Polignac number, because 680728845 - 2⁷ = 680728717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 680728794 and 680728803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680728847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 731502 + ... + 732431.

It is an arithmetic number, because the mean of its divisors is an integer number (70268832).

Almost surely, 2^680728845 is an apocalyptic number.

It is an amenable number.

680728845 is a deficient number, since it is larger than the sum of its proper divisors (443572467).

680728845 is a wasteful number, since it uses less digits than its factorization.

680728845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1463972.

The product of its (nonzero) digits is 860160, while the sum is 48.

The square root of 680728845 is about 26090.7808430488. The cubic root of 680728845 is about 879.6799994386.

The spelling of 680728845 in words is "six hundred eighty million, seven hundred twenty-eight thousand, eight hundred forty-five".