2428821 has 12 divisors (see below), whose sum is σ = 3527680. Its totient is φ = 1610280.

The previous prime is 2428787. The next prime is 2428859. The reversal of 2428821 is 1288242.

2428821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2428821 - 2¹⁰ = 2427797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2428891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1260 + ... + 2538.

2^2428821 is an apocalyptic number.

It is an amenable number.

2428821 is a deficient number, since it is larger than the sum of its proper divisors (1098859).

2428821 is a wasteful number, since it uses less digits than its factorization.

2428821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1496 (or 1493 counting only the distinct ones).

The product of its digits is 2048, while the sum is 27.

The square root of 2428821 is about 1558.4675165046. The cubic root of 2428821 is about 134.4203957674.

It can be divided in two parts, 2428 and 821, that added together give a square (3249 = 57²).

The spelling of 2428821 in words is "two million, four hundred twenty-eight thousand, eight hundred twenty-one".