2819864 has 8 divisors (see below), whose sum is σ = 5287260. Its totient is φ = 1409928.

The previous prime is 2819827. The next prime is 2819867. The reversal of 2819864 is 4689182.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2819867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 176234 + ... + 176249.

2^2819864 is an apocalyptic number.

It is an amenable number.

2819864 is a deficient number, since it is larger than the sum of its proper divisors (2467396).

2819864 is a wasteful number, since it uses less digits than its factorization.

2819864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352489 (or 352485 counting only the distinct ones).

The product of its digits is 27648, while the sum is 38.

The square root of 2819864 is about 1679.2450684757. The cubic root of 2819864 is about 141.2784932208.

The spelling of 2819864 in words is "two million, eight hundred nineteen thousand, eight hundred sixty-four".