2821740 has 48 divisors (see below), whose sum is σ = 7983360. Its totient is φ = 744640.

The previous prime is 2821733. The next prime is 2821759. The reversal of 2821740 is 471282.

2821740 is digitally balanced in base 2 and base 5, because in such bases it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 2821740.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 7681 + ... + 8039.

It is an arithmetic number, because the mean of its divisors is an integer number (166320).

2^2821740 is an apocalyptic number.

2821740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2821740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3991680).

2821740 is an abundant number, since it is smaller than the sum of its proper divisors (5161620).

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

2821740 is a wasteful number, since it uses less digits than its factorization.

2821740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502 (or 500 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 2821740 is about 1679.8035599438. The cubic root of 2821740 is about 141.3098162089.

The spelling of 2821740 in words is "two million, eight hundred twenty-one thousand, seven hundred forty".