680649072 has 20 divisors (see below), whose sum is σ = 1758343560. Its totient is φ = 226883008.

The previous prime is 680649061. The next prime is 680649121. The reversal of 680649072 is 270946086.

It is a super-2 number, since 2×680649072² = 926566318428922368, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7090047 + ... + 7090142.

It is an arithmetic number, because the mean of its divisors is an integer number (87917178).

Almost surely, 2^680649072 is an apocalyptic number.

It is an amenable number.

680649072 is an abundant number, since it is smaller than the sum of its proper divisors (1077694488).

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

680649072 is a wasteful number, since it uses less digits than its factorization.

680649072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14180200 (or 14180194 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 680649072 is about 26089.2520398727. The cubic root of 680649072 is about 879.6456355582.

The spelling of 680649072 in words is "six hundred eighty million, six hundred forty-nine thousand, seventy-two".