2821031340 has 96 divisors (see below), whose sum is σ = 8558161920. Its totient is φ = 691547136.

The previous prime is 2821031273. The next prime is 2821031359. The reversal of 2821031340 is 431301282.

It is a self number, because there is not a number n which added to its sum of digits gives 2821031340.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11701 + ... + 76019.

It is an arithmetic number, because the mean of its divisors is an integer number (89147520).

Almost surely, 2^2821031340 is an apocalyptic number.

2821031340 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 2821031340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4279080960).

2821031340 is an abundant number, since it is smaller than the sum of its proper divisors (5737130580).

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

2821031340 is a wasteful number, since it uses less digits than its factorization.

2821031340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64391 (or 64389 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 2821031340 is about 53113.3819296041. The cubic root of 2821031340 is about 1412.9798556557.

The spelling of 2821031340 in words is "two billion, eight hundred twenty-one million, thirty-one thousand, three hundred forty".