2022640 has 40 divisors (see below), whose sum is σ = 4763088. Its totient is φ = 798720.

The previous prime is 2022619. The next prime is 2022641. The reversal of 2022640 is 462202.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2022641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10384 + ... + 10576.

2^2022640 is an apocalyptic number.

2022640 is a gapful number since it is divisible by the number (20) 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 2022640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2381544).

2022640 is an abundant number, since it is smaller than the sum of its proper divisors (2740448).

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

2022640 is a wasteful number, since it uses less digits than its factorization.

2022640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337 (or 331 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 2022640 is about 1422.1954858598. The cubic root of 2022640 is about 126.4657325149.

Adding to 2022640 its reverse (462202), we get a palindrome (2484842).

It can be divided in two parts, 2022 and 640, that added together give a palindrome (2662).

The spelling of 2022640 in words is "two million, twenty-two thousand, six hundred forty".