2203640 has 32 divisors (see below), whose sum is σ = 5022000. Its totient is φ = 870144.

The previous prime is 2203637. The next prime is 2203657. The reversal of 2203640 is 463022.

It is a congruent number.

It is an unprimeable number.

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, 3251 + ... + 3869.

2^2203640 is an apocalyptic number.

2203640 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 2203640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2511000).

2203640 is an abundant number, since it is smaller than the sum of its proper divisors (2818360).

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

2203640 is a wasteful number, since it uses less digits than its factorization.

2203640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719 (or 715 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 2203640 is about 1484.4662340383. The cubic root of 2203640 is about 130.1308347504.

Adding to 2203640 its reverse (463022), we get a palindrome (2666662).

The spelling of 2203640 in words is "two million, two hundred three thousand, six hundred forty".