2281636 has 24 divisors (see below), whose sum is σ = 4659200. Its totient is φ = 977256.

The previous prime is 2281619. The next prime is 2281651. The reversal of 2281636 is 6361822.

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 7 ways as a sum of consecutive naturals, for example, 541 + ... + 2203.

2^2281636 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 2281636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2329600).

2281636 is an abundant number, since it is smaller than the sum of its proper divisors (2377564).

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

2281636 is a wasteful number, since it uses less digits than its factorization.

2281636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1688 (or 1672 counting only the distinct ones).

The product of its digits is 3456, while the sum is 28.

The square root of 2281636 is about 1510.5085236436. The cubic root of 2281636 is about 131.6483600748.

The spelling of 2281636 in words is "two million, two hundred eighty-one thousand, six hundred thirty-six".