2865821140 has 48 divisors (see below), whose sum is σ = 7407050112. Its totient is φ = 906984576.

The previous prime is 2865821111. The next prime is 2865821171. The reversal of 2865821140 is 411285682.

It is a self number, because there is not a number n which added to its sum of digits gives 2865821140.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 785494 + ... + 789133.

It is an arithmetic number, because the mean of its divisors is an integer number (154313544).

Almost surely, 2^2865821140 is an apocalyptic number.

2865821140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2865821140 is an abundant number, since it is smaller than the sum of its proper divisors (4541228972).

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

2865821140 is a wasteful number, since it uses less digits than its factorization.

2865821140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1574656 (or 1574654 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 37.

The square root of 2865821140 is about 53533.3647363959. The cubic root of 2865821140 is about 1420.4186327692.

The spelling of 2865821140 in words is "two billion, eight hundred sixty-five million, eight hundred twenty-one thousand, one hundred forty".