720680916 has 24 divisors (see below), whose sum is σ = 1683922240. Its totient is φ = 239893632.

The previous prime is 720680867. The next prime is 720680921. The reversal of 720680916 is 619086027.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32581 + ... + 50028.

Almost surely, 2^720680916 is an apocalyptic number.

It is an amenable number.

720680916 is an abundant number, since it is smaller than the sum of its proper divisors (963241324).

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

720680916 is a wasteful number, since it uses less digits than its factorization.

720680916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83343 (or 83341 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 720680916 is about 26845.5008520981. The cubic root of 720680916 is about 896.5634029004.

The spelling of 720680916 in words is "seven hundred twenty million, six hundred eighty thousand, nine hundred sixteen".