9981730 has 32 divisors (see below), whose sum is σ = 19813248. Its totient is φ = 3590400.

The previous prime is 9981691. The next prime is 9981731. The reversal of 9981730 is 371899.

It is a self number, because there is not a number n which added to its sum of digits gives 9981730.

It is not an unprimeable number, because it can be changed into a prime (9981731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10890 + ... + 11770.

It is an arithmetic number, because the mean of its divisors is an integer number (619164).

Almost surely, 2^9981730 is an apocalyptic number.

9981730 is a deficient number, since it is larger than the sum of its proper divisors (9831518).

9981730 is a wasteful number, since it uses less digits than its factorization.

9981730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1002.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 9981730 is about 3159.3875988868. The cubic root of 9981730 is about 215.3121839455.

The spelling of 9981730 in words is "nine million, nine hundred eighty-one thousand, seven hundred thirty".