2861944800 has 576 divisors, whose sum is σ = 11339274240. Its totient is φ = 617472000.

The previous prime is 2861944777. The next prime is 2861944807. The reversal of 2861944800 is 84491682.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2861944807) by changing a digit.

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 95 ways as a sum of consecutive naturals, for example, 10639066 + ... + 10639334.

It is an arithmetic number, because the mean of its divisors is an integer number (19686240).

Almost surely, 2^2861944800 is an apocalyptic number.

2861944800 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 2861944800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5669637120).

2861944800 is an abundant number, since it is smaller than the sum of its proper divisors (8477329440).

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

2861944800 is a wasteful number, since it uses less digits than its factorization.

2861944800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347 (or 334 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 42.

The square root of 2861944800 is about 53497.1475875116. The cubic root of 2861944800 is about 1419.7779193792. Note that the first 3 decimals are identical.

The spelling of 2861944800 in words is "two billion, eight hundred sixty-one million, nine hundred forty-four thousand, eight hundred".