9724041728 has 40 divisors (see below), whose sum is σ = 19607452260. Its totient is φ = 4817387520.

The previous prime is 9724041689. The next prime is 9724041731. The reversal of 9724041728 is 8271404279.

It can be written as a sum of positive squares in 2 ways, for example, as 9176107264 + 547934464 = 95792^2 + 23408^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31313 + ... + 142928.

Almost surely, 2^9724041728 is an apocalyptic number.

It is an amenable number.

9724041728 is an abundant number, since it is smaller than the sum of its proper divisors (9883410532).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9724041728 is a wasteful number, since it uses less digits than its factorization.

9724041728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174368 (or 174352 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 44.

The square root of 9724041728 is about 98610.5558649783. Note that the first 3 decimals coincide. The cubic root of 9724041728 is about 2134.4317440754.

The spelling of 9724041728 in words is "nine billion, seven hundred twenty-four million, forty-one thousand, seven hundred twenty-eight".