22000405 has 8 divisors (see below), whose sum is σ = 30172032. Its totient is φ = 15085968.

The previous prime is 22000403. The next prime is 22000409. The reversal of 22000405 is 50400022.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22000405 - 2¹ = 22000403 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22000403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 314257 + ... + 314326.

It is an arithmetic number, because the mean of its divisors is an integer number (3771504).

Almost surely, 2^22000405 is an apocalyptic number.

It is an amenable number.

22000405 is a deficient number, since it is larger than the sum of its proper divisors (8171627).

22000405 is an equidigital number, since it uses as much as digits as its factorization.

22000405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628595.

The product of its (nonzero) digits is 80, while the sum is 13.

The square root of 22000405 is about 4690.4589327698. The cubic root of 22000405 is about 280.2056524882.

Adding to 22000405 its reverse (50400022), we get a palindrome (72400427).

The spelling of 22000405 in words is "twenty-two million, four hundred five", and thus it is an aban number.