22202640 has 160 divisors (see below), whose sum is σ = 80649600. Its totient is φ = 5598720.

The previous prime is 22202633. The next prime is 22202651. The reversal of 22202640 is 4620222.

It is a happy number.

22202640 is a `hidden beast` number, since 2 + 2 + 20 + 2 + 640 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40770 + ... + 41310.

It is an arithmetic number, because the mean of its divisors is an integer number (504060).

Almost surely, 2^22202640 is an apocalyptic number.

22202640 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 22202640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40324800).

22202640 is an abundant number, since it is smaller than the sum of its proper divisors (58446960).

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

22202640 is a wasteful number, since it uses less digits than its factorization.

22202640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 582 (or 570 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 22202640 is about 4711.9677418251. The cubic root of 22202640 is about 281.0616160690.

Adding to 22202640 its reverse (4620222), we get a palindrome (26822862).

The spelling of 22202640 in words is "twenty-two million, two hundred two thousand, six hundred forty".