9428 has 6 divisors (see below), whose sum is σ = 16506.
Its totient is φ = 4712.
The previous prime is 9421. The next prime is 9431. The reversal of 9428 is 8249.
It can be written as a sum of positive squares in only one way, i.e., 6724 + 2704 = 82^2 + 52^2
It is a plaindrome in base 12.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (9421) by changing a digit.
9428 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1175 + ... + 1182.
It is an arithmetic number, because the mean of its divisors is an integer number (2751).
29428 is an apocalyptic number.
It is an amenable number.
9428 is a deficient number, since it is larger than the sum of its proper divisors (7078).
9428 is a wasteful number, since it uses less digits than its factorization.
9428 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 2361 (or 2359 counting only the distinct ones).
The product of its digits is 576, while the sum is 23.
The square root of 9428 is about 97.0978887515.
The cubic root of 9428 is about 21.1254770384.
The spelling of 9428 in words is "nine thousand, four hundred twenty-eight".