2851389 has 8 divisors (see below), whose sum is σ = 4224320. Its totient is φ = 1900908.

The previous prime is 2851361. The next prime is 2851391. The reversal of 2851389 is 9831582.

2851389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2851389 - 2¹² = 2847293 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2851399) by changing a digit.

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, 52777 + ... + 52830.

It is an arithmetic number, because the mean of its divisors is an integer number (528040).

2^2851389 is an apocalyptic number.

It is an amenable number.

2851389 is a deficient number, since it is larger than the sum of its proper divisors (1372931).

2851389 is a wasteful number, since it uses less digits than its factorization.

2851389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105616 (or 105610 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 2851389 is about 1688.6056377971. The cubic root of 2851389 is about 141.8030231915.

It can be divided in two parts, 2851 and 389, that added together give a triangular number (3240 = T₈₀).

The spelling of 2851389 in words is "two million, eight hundred fifty-one thousand, three hundred eighty-nine".