17428 has 6 divisors (see below), whose sum is σ = 30506. Its totient is φ = 8712.

The previous prime is 17419. The next prime is 17431. The reversal of 17428 is 82471.

17428 is nontrivially palindromic in base 8.

It can be written as a sum of positive squares in only one way, i.e., 17424 + 4 = 132^2 + 2^2 .

It is a junction number, because it is equal to n+sod(n) for n = 17399 and 17408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2175 + ... + 2182.

17428 is a Friedman number, since it can be written as 8714*2, using all its digits and the basic arithmetic operations.

2¹⁷⁴²⁸ is an apocalyptic number.

It is an amenable number.

17428 is a deficient number, since it is larger than the sum of its proper divisors (13078).

17428 is a wasteful number, since it uses less digits than its factorization.

17428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4361 (or 4359 counting only the distinct ones).

The product of its digits is 448, while the sum is 22.

The square root of 17428 is about 132.0151506457. The cubic root of 17428 is about 25.9268158929.

Adding to 17428 its reverse (82471), we get a palindrome (99899).

It can be divided in two parts, 174 and 28, that added together give a palindrome (202).

The spelling of 17428 in words is "seventeen thousand, four hundred twenty-eight".