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9730 = 257139
BaseRepresentation
bin10011000000010
3111100101
42120002
5302410
6113014
740240
oct23002
914311
109730
117346
12576a
134576
143790
152d3a
hex2602

9730 has 16 divisors (see below), whose sum is σ = 20160. Its totient is φ = 3312.

The previous prime is 9721. The next prime is 9733. The reversal of 9730 is 379.

It is a happy number.

9730 is a nontrivial binomial coefficient, being equal to C(140, 2).

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 9698 and 9707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1 + ... + 139.

It is an arithmetic number, because the mean of its divisors is an integer number (1260).

9730 is the 139-th triangular number and also the 70-th hexagonal number.

9730 is the 47-th centered nonagonal number.

9730 is an abundant number, since it is smaller than the sum of its proper divisors (10430).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10080).

9730 is a wasteful number, since it uses less digits than its factorization.

It is an anagram of its base 14 representation: 9730 = (3790)14.

9730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153.

The product of its (nonzero) digits is 189, while the sum is 19.

The square root of 9730 is about 98.6407623653. The cubic root of 9730 is about 21.3486760290.

The spelling of 9730 in words is "nine thousand, seven hundred thirty".