2813864 has 8 divisors (see below), whose sum is σ = 5276010. Its totient is φ = 1406928.

The previous prime is 2813851. The next prime is 2813879. The reversal of 2813864 is 4683182.

It can be written as a sum of positive squares in only one way, i.e., 2788900 + 24964 = 1670^2 + 158^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×2813864² = 15835661220992, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2813864.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 175859 + ... + 175874.

2^2813864 is an apocalyptic number.

It is an amenable number.

2813864 is a deficient number, since it is larger than the sum of its proper divisors (2462146).

2813864 is a wasteful number, since it uses less digits than its factorization.

2813864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351739 (or 351735 counting only the distinct ones).

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

The square root of 2813864 is about 1677.4576000603. The cubic root of 2813864 is about 141.1782197223.

The spelling of 2813864 in words is "two million, eight hundred thirteen thousand, eight hundred sixty-four".