2201640 has 64 divisors (see below), whose sum is σ = 7551360. Its totient is φ = 503040.

The previous prime is 2201627. The next prime is 2201669. The reversal of 2201640 is 461022.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 471 + ... + 2150.

It is an arithmetic number, because the mean of its divisors is an integer number (117990).

2^2201640 is an apocalyptic number.

2201640 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 2201640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3775680).

2201640 is an abundant number, since it is smaller than the sum of its proper divisors (5349720).

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

2201640 is a wasteful number, since it uses less digits than its factorization.

2201640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2642 (or 2638 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 2201640 is about 1483.7924383147. The cubic root of 2201640 is about 130.0914543849.

Adding to 2201640 its reverse (461022), we get a palindrome (2662662).

The spelling of 2201640 in words is "two million, two hundred one thousand, six hundred forty".