2859820 has 24 divisors (see below), whose sum is σ = 6267744. Its totient is φ = 1094016.

The previous prime is 2859803. The next prime is 2859847. The reversal of 2859820 is 289582.

2859820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 7 ways as a sum of consecutive naturals, for example, 2649 + ... + 3568.

It is an arithmetic number, because the mean of its divisors is an integer number (261156).

2^2859820 is an apocalyptic number.

2859820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2859820 is an abundant number, since it is smaller than the sum of its proper divisors (3407924).

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

2859820 is a wasteful number, since it uses less digits than its factorization.

2859820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6249 (or 6247 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 2859820 is about 1691.1002335758. The cubic root of 2859820 is about 141.9426469437.

The spelling of 2859820 in words is "two million, eight hundred fifty-nine thousand, eight hundred twenty".