22402405 has 4 divisors (see below), whose sum is σ = 26882892. Its totient is φ = 17921920.

The previous prime is 22402399. The next prime is 22402421. The reversal of 22402405 is 50420422.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17447329 + 4955076 = 4177^2 + 2226^2 .

It is a de Polignac number, because none of the positive numbers 2^k-22402405 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2240236 + ... + 2240245.

It is an arithmetic number, because the mean of its divisors is an integer number (6720723).

Almost surely, 2^22402405 is an apocalyptic number.

It is an amenable number.

22402405 is a deficient number, since it is larger than the sum of its proper divisors (4480487).

22402405 is an equidigital number, since it uses as much as digits as its factorization.

22402405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4480486.

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 22402405 is about 4733.1178941581. The cubic root of 22402405 is about 281.9020374653.

Adding to 22402405 its reverse (50420422), we get a palindrome (72822827).

The spelling of 22402405 in words is "twenty-two million, four hundred two thousand, four hundred five".