720584 has 8 divisors (see below), whose sum is σ = 1351110. Its totient is φ = 360288.

The previous prime is 720571. The next prime is 720607. The reversal of 720584 is 485027.

It can be written as a sum of positive squares in only one way, i.e., 688900 + 31684 = 830^2 + 178^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 720584.

It is an unprimeable number.

720584 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 as a sum of consecutive naturals, namely, 45029 + ... + 45044.

2⁷²⁰⁵⁸⁴ is an apocalyptic number.

It is an amenable number.

720584 is a deficient number, since it is larger than the sum of its proper divisors (630526).

720584 is a wasteful number, since it uses less digits than its factorization.

720584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90079 (or 90075 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 720584 is about 848.8721929714. The cubic root of 720584 is about 89.6523211635.

The spelling of 720584 in words is "seven hundred twenty thousand, five hundred eighty-four".