9709470728 has 8 divisors (see below), whose sum is σ = 18205257630. Its totient is φ = 4854735360.

The previous prime is 9709470709. The next prime is 9709470767. The reversal of 9709470728 is 8270749079.

It can be written as a sum of positive squares in only one way, i.e., 7207670404 + 2501800324 = 84898^2 + 50018^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 9709470728.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606841913 + ... + 606841928.

Almost surely, 2^9709470728 is an apocalyptic number.

It is an amenable number.

9709470728 is a deficient number, since it is larger than the sum of its proper divisors (8495786902).

9709470728 is a wasteful number, since it uses less digits than its factorization.

9709470728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1213683847 (or 1213683843 counting only the distinct ones).

The product of its (nonzero) digits is 1778112, while the sum is 53.

The square root of 9709470728 is about 98536.6466244919. The cubic root of 9709470728 is about 2133.3650973352.

The spelling of 9709470728 in words is "nine billion, seven hundred nine million, four hundred seventy thousand, seven hundred twenty-eight".