680747328 has 70 divisors (see below), whose sum is σ = 2017963706. Its totient is φ = 226914048.

The previous prime is 680747297. The next prime is 680747329. The reversal of 680747328 is 823747086.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 501401664 + 179345664 = 22392^2 + 13392^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680747329) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 60475 + ... + 70842.

Almost surely, 2^680747328 is an apocalyptic number.

It is an amenable number.

680747328 is an abundant number, since it is smaller than the sum of its proper divisors (1337216378).

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

680747328 is a wasteful number, since it uses less digits than its factorization.

680747328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131341 (or 131322 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 45.

The square root of 680747328 is about 26091.1350462183. The cubic root of 680747328 is about 879.6879609926.

The spelling of 680747328 in words is "six hundred eighty million, seven hundred forty-seven thousand, three hundred twenty-eight".