22280405 has 16 divisors (see below), whose sum is σ = 31135104. Its totient is φ = 14988480.

The previous prime is 22280383. The next prime is 22280411. The reversal of 22280405 is 50408222.

It is not a de Polignac number, because 22280405 - 2¹⁸ = 22018261 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4151 + ... + 7860.

It is an arithmetic number, because the mean of its divisors is an integer number (1945944).

Almost surely, 2^22280405 is an apocalyptic number.

It is an amenable number.

22280405 is a deficient number, since it is larger than the sum of its proper divisors (8854699).

22280405 is a wasteful number, since it uses less digits than its factorization.

22280405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12076.

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 22280405 is about 4720.2123892893. The cubic root of 22280405 is about 281.3893742135.

Adding to 22280405 its reverse (50408222), we get a palindrome (72688627).

The spelling of 22280405 in words is "twenty-two million, two hundred eighty thousand, four hundred five".