9999730 has 48 divisors (see below), whose sum is σ = 20014344. Its totient is φ = 3594240.

The previous prime is 9999713. The next prime is 9999739. The reversal of 9999730 is 379999.

It can be written as a sum of positive squares in 12 ways, for example, as 1490841 + 8508889 = 1221^2 + 2917^2 .

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (9999739) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 103042 + ... + 103138.

Almost surely, 2^9999730 is an apocalyptic number.

9999730 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

9999730 is a wasteful number, since it uses less digits than its factorization.

9999730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191 (or 178 counting only the distinct ones).

The product of its (nonzero) digits is 137781, while the sum is 46.

The square root of 9999730 is about 3162.2349691318. The cubic root of 9999730 is about 215.4415299945.

The spelling of 9999730 in words is "nine million, nine hundred ninety-nine thousand, seven hundred thirty".