2851800 has 144 divisors (see below), whose sum is σ = 10389960. Its totient is φ = 645120.

The previous prime is 2851799. The next prime is 2851813. The reversal of 2851800 is 81582.

2851800 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

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 35 ways as a sum of consecutive naturals, for example, 29352 + ... + 29448.

2^2851800 is an apocalyptic number.

2851800 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 2851800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5194980).

2851800 is an abundant number, since it is smaller than the sum of its proper divisors (7538160).

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

2851800 is a wasteful number, since it uses less digits than its factorization.

2851800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130 (or 114 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 24.

The square root of 2851800 is about 1688.7273314541. The cubic root of 2851800 is about 141.8098360399.

The spelling of 2851800 in words is "two million, eight hundred fifty-one thousand, eight hundred".