2681812 has 36 divisors (see below), whose sum is σ = 5726560. Its totient is φ = 1073520.

The previous prime is 2681807. The next prime is 2681827. The reversal of 2681812 is 2181862.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37737 + ... + 37807.

2^2681812 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2681812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2863280).

2681812 is an abundant number, since it is smaller than the sum of its proper divisors (3044748).

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

2681812 is a wasteful number, since it uses less digits than its factorization.

2681812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172 (or 99 counting only the distinct ones).

The product of its digits is 1536, while the sum is 28.

The square root of 2681812 is about 1637.6238884433. The cubic root of 2681812 is about 138.9342891105.

It can be divided in two parts, 268 and 1812, that added together give a triangular number (2080 = T₆₄).

The spelling of 2681812 in words is "two million, six hundred eighty-one thousand, eight hundred twelve".