22440210 has 64 divisors (see below), whose sum is σ = 58520448. Its totient is φ = 5474304.

The previous prime is 22440179. The next prime is 22440239. The reversal of 22440210 is 1204422.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 22440210.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63394 + ... + 63746.

It is an arithmetic number, because the mean of its divisors is an integer number (914382).

Almost surely, 2^22440210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22440210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29260224).

22440210 is an abundant number, since it is smaller than the sum of its proper divisors (36080238).

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

22440210 is a wasteful number, since it uses less digits than its factorization.

22440210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539.

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 22440210 is about 4737.1098783963. The cubic root of 22440210 is about 282.0605221943.

Adding to 22440210 its reverse (1204422), we get a palindrome (23644632).

The spelling of 22440210 in words is "twenty-two million, four hundred forty thousand, two hundred ten".