9729856 has 14 divisors (see below), whose sum is σ = 19307810. Its totient is φ = 4864896.

The previous prime is 9729829. The next prime is 9729857. The reversal of 9729856 is 6589279.

It can be written as a sum of positive squares in only one way, i.e., 8761600 + 968256 = 2960^2 + 984^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9729857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75951 + ... + 76078.

Almost surely, 2^9729856 is an apocalyptic number.

It is an amenable number.

9729856 is a deficient number, since it is larger than the sum of its proper divisors (9577954).

9729856 is a wasteful number, since it uses less digits than its factorization.

9729856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152041 (or 152031 counting only the distinct ones).

The product of its digits is 272160, while the sum is 46.

The square root of 9729856 is about 3119.2717098708. The cubic root of 9729856 is about 213.4857071130.

It can be divided in two parts, 9729 and 856, that added together give a triangular number (10585 = T₁₄₅).

The spelling of 9729856 in words is "nine million, seven hundred twenty-nine thousand, eight hundred fifty-six".