720676 has 18 divisors (see below), whose sum is σ = 1387190. Its totient is φ = 327360.

The previous prime is 720661. The next prime is 720677. The reversal of 720676 is 676027.

It can be written as a sum of positive squares in only one way, i.e., 527076 + 193600 = 726^2 + 440^2 .

It is not an unprimeable number, because it can be changed into a prime (720677) by changing a digit.

720676 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 261 + ... + 1228.

2⁷²⁰⁶⁷⁶ is an apocalyptic number.

It is an amenable number.

720676 is a deficient number, since it is larger than the sum of its proper divisors (666514).

720676 is a wasteful number, since it uses less digits than its factorization.

720676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1515 (or 1502 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 28.

The square root of 720676 is about 848.9263807893. The cubic root of 720676 is about 89.6561364312.

The spelling of 720676 in words is "seven hundred twenty thousand, six hundred seventy-six".