24428 has 12 divisors (see below), whose sum is σ = 44352. Its totient is φ = 11760.

The previous prime is 24421. The next prime is 24439. The reversal of 24428 is 82442.

It is an Ulam number.

24428 is an undulating number in base 14.

It is not an unprimeable number, because it can be changed into a prime (24421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26 + ... + 222.

It is an arithmetic number, because the mean of its divisors is an integer number (3696).

2²⁴⁴²⁸ is an apocalyptic number.

It is an amenable number.

24428 is a deficient number, since it is larger than the sum of its proper divisors (19924).

24428 is a wasteful number, since it uses less digits than its factorization.

24428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232 (or 230 counting only the distinct ones).

The product of its digits is 512, while the sum is 20.

The square root of 24428 is about 156.2945936365. The cubic root of 24428 is about 29.0154495562.

It can be divided in two parts, 244 and 28, that added together give a palindrome (272).

The spelling of 24428 in words is "twenty-four thousand, four hundred twenty-eight".