2428 has 6 divisors (see below), whose sum is σ = 4256.
Its totient is φ = 1212.
The previous prime is 2423. The next prime is 2437. The reversal of 2428 is 8242.
Adding to 2428 its product of digits (128), we get a triangular number (2556 = T71).
It can be divided in two parts, 242 and 8, that multiplied together give a square (1936 = 442).
It is a plaindrome in base 13 and base 15.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (2423) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 300 + ... + 307.
22428 is an apocalyptic number.
It is an amenable number.
2428 is a deficient number, since it is larger than the sum of its proper divisors (1828).
2428 is a wasteful number, since it uses less digits than its factorization.
2428 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 611 (or 609 counting only the distinct ones).
The product of its digits is 128, while the sum is 16.
The square root of 2428 is about 49.2747399790.
The cubic root of 2428 is about 13.4405248283.
The spelling of 2428 in words is "two thousand, four hundred twenty-eight".