22842405 has 20 divisors (see below), whose sum is σ = 40947852. Its totient is φ = 12182400.

The previous prime is 22842397. The next prime is 22842419. The reversal of 22842405 is 50424822.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11329956 + 11512449 = 3366^2 + 3393^2 .

It is not a de Polignac number, because 22842405 - 2³ = 22842397 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

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 19 ways as a sum of consecutive naturals, for example, 27796 + ... + 28605.

Almost surely, 2^22842405 is an apocalyptic number.

It is an amenable number.

22842405 is a deficient number, since it is larger than the sum of its proper divisors (18105447).

22842405 is an equidigital number, since it uses as much as digits as its factorization.

22842405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56418 (or 56409 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

The square root of 22842405 is about 4779.3728668100. The cubic root of 22842405 is about 283.7356736866.

The spelling of 22842405 in words is "twenty-two million, eight hundred forty-two thousand, four hundred five".