2209812 has 24 divisors (see below), whose sum is σ = 5625312. Its totient is φ = 669600.

The previous prime is 2209811. The next prime is 2209841. The reversal of 2209812 is 2189022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2209811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8239 + ... + 8502.

It is an arithmetic number, because the mean of its divisors is an integer number (234388).

2^2209812 is an apocalyptic number.

2209812 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2209812 is an abundant number, since it is smaller than the sum of its proper divisors (3415500).

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

2209812 is a wasteful number, since it uses less digits than its factorization.

2209812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16759 (or 16757 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 2209812 is about 1486.5436421444. The cubic root of 2209812 is about 130.2522125365.

The spelling of 2209812 in words is "two million, two hundred nine thousand, eight hundred twelve".