2022636 has 72 divisors (see below), whose sum is σ = 5958400. Its totient is φ = 522720.

The previous prime is 2022619. The next prime is 2022641. The reversal of 2022636 is 6362202.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10065 + ... + 10263.

2^2022636 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 2022636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2979200).

2022636 is an abundant number, since it is smaller than the sum of its proper divisors (3935764).

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

2022636 is a wasteful number, since it uses less digits than its factorization.

2022636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235 (or 222 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 2022636 is about 1422.1940795827. The cubic root of 2022636 is about 126.4656491480.

Adding to 2022636 its reverse (6362202), we get a palindrome (8384838).

The spelling of 2022636 in words is "two million, twenty-two thousand, six hundred thirty-six".