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9804 = 2231943
BaseRepresentation
bin10011001001100
3111110010
42121030
5303204
6113220
740404
oct23114
914403
109804
117403
125810
134602
143804
152d89
hex264c

9804 has 24 divisors (see below), whose sum is σ = 24640. Its totient is φ = 3024.

The previous prime is 9803. The next prime is 9811. The reversal of 9804 is 4089.

9804 is nontrivially palindromic in base 7.

It is a super-2 number, since 2×98042 = 192236832, which contains 22 as substring.

It is an Ulam number.

9804 is an undulating number in base 7.

It is not an unprimeable number, because it can be changed into a prime (9803) 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, 207 + ... + 249.

29804 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12320).

9804 is an abundant number, since it is smaller than the sum of its proper divisors (14836).

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

9804 is a wasteful number, since it uses less digits than its factorization.

9804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69 (or 67 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 9804 is about 99.0151503559. The cubic root of 9804 is about 21.4026607458.

The spelling of 9804 in words is "nine thousand, eight hundred four".

Divisors: 1 2 3 4 6 12 19 38 43 57 76 86 114 129 172 228 258 516 817 1634 2451 3268 4902 9804