2816840 has 32 divisors (see below), whose sum is σ = 6826680. Its totient is φ = 1039872.

The previous prime is 2816839. The next prime is 2816861. The reversal of 2816840 is 486182.

It can be written as a sum of positive squares in 4 ways, for example, as 1069156 + 1747684 = 1034^2 + 1322^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2189 + ... + 3228.

2^2816840 is an apocalyptic number.

2816840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2816840 is an abundant number, since it is smaller than the sum of its proper divisors (4009840).

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

2816840 is a wasteful number, since it uses less digits than its factorization.

2816840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5441 (or 5437 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 2816840 is about 1678.3444223401. The cubic root of 2816840 is about 141.2279731753.

The spelling of 2816840 in words is "two million, eight hundred sixteen thousand, eight hundred forty".