22220770 has 64 divisors (see below), whose sum is σ = 48263040. Its totient is φ = 7257600.

The previous prime is 22220761. The next prime is 22220771. The reversal of 22220770 is 7702222.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (22220771) 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 31 ways as a sum of consecutive naturals, for example, 58441 + ... + 58819.

It is an arithmetic number, because the mean of its divisors is an integer number (754110).

Almost surely, 2^22220770 is an apocalyptic number.

22220770 is an abundant number, since it is smaller than the sum of its proper divisors (26042270).

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

22220770 is a wasteful number, since it uses less digits than its factorization.

22220770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451.

The product of its (nonzero) digits is 784, while the sum is 22.

The square root of 22220770 is about 4713.8911739666. The cubic root of 22220770 is about 281.1380973755.

Adding to 22220770 its reverse (7702222), we get a palindrome (29922992).

The spelling of 22220770 in words is "twenty-two million, two hundred twenty thousand, seven hundred seventy".