9728072 has 8 divisors (see below), whose sum is σ = 18240150. Its totient is φ = 4864032.

The previous prime is 9728071. The next prime is 9728123. The reversal of 9728072 is 2708279.

It can be written as a sum of positive squares in only one way, i.e., 9572836 + 155236 = 3094^2 + 394^2 .

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

It is not an unprimeable number, because it can be changed into a prime (9728071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607997 + ... + 608012.

Almost surely, 2^9728072 is an apocalyptic number.

It is an amenable number.

9728072 is a deficient number, since it is larger than the sum of its proper divisors (8512078).

9728072 is a wasteful number, since it uses less digits than its factorization.

9728072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1216015 (or 1216011 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 9728072 is about 3118.9857325740. The cubic root of 9728072 is about 213.4726585547.

The spelling of 9728072 in words is "nine million, seven hundred twenty-eight thousand, seventy-two".