9780724 has 6 divisors (see below), whose sum is σ = 17116274. Its totient is φ = 4890360.

The previous prime is 9780721. The next prime is 9780731. The reversal of 9780724 is 4270879.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 9108324 + 672400 = 3018^2 + 820^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9780721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1222587 + ... + 1222594.

Almost surely, 2^9780724 is an apocalyptic number.

It is an amenable number.

9780724 is a deficient number, since it is larger than the sum of its proper divisors (7335550).

9780724 is a wasteful number, since it uses less digits than its factorization.

9780724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2445185 (or 2445183 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 9780724 is about 3127.4149069159. The cubic root of 9780724 is about 213.8570973632.

The spelling of 9780724 in words is "nine million, seven hundred eighty thousand, seven hundred twenty-four".