2851863 has 16 divisors (see below), whose sum is σ = 4381440. Its totient is φ = 1616256.

The previous prime is 2851861. The next prime is 2851867. The reversal of 2851863 is 3681582.

It is a happy number.

It is not a de Polignac number, because 2851863 - 2¹ = 2851861 is a prime.

2851863 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2851861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2431 + ... + 3407.

It is an arithmetic number, because the mean of its divisors is an integer number (273840).

2^2851863 is an apocalyptic number.

2851863 is a deficient number, since it is larger than the sum of its proper divisors (1529577).

2851863 is a wasteful number, since it uses less digits than its factorization.

2851863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1126.

The product of its digits is 11520, while the sum is 33.

The square root of 2851863 is about 1688.7459844512. The cubic root of 2851863 is about 141.8108802872.

It can be divided in two parts, 285186 and 3, that multiplied together give a palindrome (855558).

The spelling of 2851863 in words is "two million, eight hundred fifty-one thousand, eight hundred sixty-three".