22280218 has 16 divisors (see below), whose sum is σ = 33907104. Its totient is φ = 10979280.

The previous prime is 22280213. The next prime is 22280243. The reversal of 22280218 is 81208222.

It is a super-2 number, since 2×22280218² = 992816228255048, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22280192 and 22280201.

It is not an unprimeable number, because it can be changed into a prime (22280213) 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 7 ways as a sum of consecutive naturals, for example, 72421 + ... + 72727.

It is an arithmetic number, because the mean of its divisors is an integer number (2119194).

Almost surely, 2^22280218 is an apocalyptic number.

22280218 is a deficient number, since it is larger than the sum of its proper divisors (11626886).

22280218 is a wasteful number, since it uses less digits than its factorization.

22280218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 717.

The product of its (nonzero) digits is 1024, while the sum is 25.

The square root of 22280218 is about 4720.1925808170. The cubic root of 22280218 is about 281.3885869753.

The spelling of 22280218 in words is "twenty-two million, two hundred eighty thousand, two hundred eighteen".