9729728452 has 24 divisors (see below), whose sum is σ = 17238866400. Its totient is φ = 4804383936.

The previous prime is 9729728443. The next prime is 9729728467. The reversal of 9729728452 is 2548279279.

It is a junction number, because it is equal to n+sod(n) for n = 9729728393 and 9729728402.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1300699 + ... + 1308157.

It is an arithmetic number, because the mean of its divisors is an integer number (718286100).

Almost surely, 2^9729728452 is an apocalyptic number.

It is an amenable number.

9729728452 is a deficient number, since it is larger than the sum of its proper divisors (7509137948).

9729728452 is a wasteful number, since it uses less digits than its factorization.

9729728452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11475 (or 11473 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 55.

The square root of 9729728452 is about 98639.3859064421. The cubic root of 9729728452 is about 2134.8477425256.

The spelling of 9729728452 in words is "nine billion, seven hundred twenty-nine million, seven hundred twenty-eight thousand, four hundred fifty-two".