2921824 has 48 divisors (see below), whose sum is σ = 6286896. Its totient is φ = 1331200.

The previous prime is 2921819. The next prime is 2921861. The reversal of 2921824 is 4281292.

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 2921792 and 2921801.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22239 + ... + 22369.

It is an arithmetic number, because the mean of its divisors is an integer number (130977).

2^2921824 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2921824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3143448).

2921824 is an abundant number, since it is smaller than the sum of its proper divisors (3365072).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2921824 is a wasteful number, since it uses less digits than its factorization.

2921824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199 (or 191 counting only the distinct ones).

The product of its digits is 2304, while the sum is 28.

The square root of 2921824 is about 1709.3343733746. The cubic root of 2921824 is about 142.9611448382.

It can be divided in two parts, 292 and 1824, that added together give a square (2116 = 46²).

The spelling of 2921824 in words is "two million, nine hundred twenty-one thousand, eight hundred twenty-four".