2640812 has 24 divisors (see below), whose sum is σ = 4791360. Its totient is φ = 1272960.

The previous prime is 2640779. The next prime is 2640821. The reversal of 2640812 is 2180462.

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, 19208 + ... + 19344.

It is an arithmetic number, because the mean of its divisors is an integer number (199640).

2^2640812 is an apocalyptic number.

It is an amenable number.

2640812 is a deficient number, since it is larger than the sum of its proper divisors (2150548).

2640812 is a wasteful number, since it uses less digits than its factorization.

2640812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281 (or 279 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 2640812 is about 1625.0575374429. The cubic root of 2640812 is about 138.2226330054. Note that the first 3 decimals are identical.

The spelling of 2640812 in words is "two million, six hundred forty thousand, eight hundred twelve".