2831864 has 32 divisors (see below), whose sum is σ = 6175200. Its totient is φ = 1192320.

The previous prime is 2831863. The next prime is 2831903. The reversal of 2831864 is 4681382.

2831864 = T₈₉₆ + T₈₉₇ + ... + T₉₀₂.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 2831864.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2831861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3002 + ... + 3830.

It is an arithmetic number, because the mean of its divisors is an integer number (192975).

2^2831864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2831864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3087600).

2831864 is an abundant number, since it is smaller than the sum of its proper divisors (3343336).

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

2831864 is a wasteful number, since it uses less digits than its factorization.

2831864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 903 (or 899 counting only the distinct ones).

The product of its digits is 9216, while the sum is 32.

The square root of 2831864 is about 1682.8143094234. The cubic root of 2831864 is about 141.4786143060.

It can be divided in two parts, 28318 and 64, that added together give a palindrome (28382).

The spelling of 2831864 in words is "two million, eight hundred thirty-one thousand, eight hundred sixty-four".