2803812 has 36 divisors (see below), whose sum is σ = 7194768. Its totient is φ = 849200.

The previous prime is 2803799. The next prime is 2803813. The reversal of 2803812 is 2183082.

It is a super-2 number, since 2×2803812² = 15722723462688, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2803813) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 487 + ... + 2417.

2^2803812 is an apocalyptic number.

2803812 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2803812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3597384).

2803812 is an abundant number, since it is smaller than the sum of its proper divisors (4390956).

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

2803812 is a wasteful number, since it uses less digits than its factorization.

2803812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1960 (or 1947 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 2803812 is about 1674.4587185117. The cubic root of 2803812 is about 141.0099082620.

Adding to 2803812 its reverse (2183082), we get a palindrome (4986894).

The spelling of 2803812 in words is "two million, eight hundred three thousand, eight hundred twelve".