22404445 has 8 divisors (see below), whose sum is σ = 30726144. Its totient is φ = 15363024.

The previous prime is 22404427. The next prime is 22404463. The reversal of 22404445 is 54440422.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (22404427) and next prime (22404463).

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 22404445 - 2²¹ = 20307293 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 7 ways as a sum of consecutive naturals, for example, 320029 + ... + 320098.

It is an arithmetic number, because the mean of its divisors is an integer number (3840768).

Almost surely, 2^22404445 is an apocalyptic number.

It is an amenable number.

22404445 is a deficient number, since it is larger than the sum of its proper divisors (8321699).

22404445 is an equidigital number, since it uses as much as digits as its factorization.

22404445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640139.

The product of its (nonzero) digits is 5120, while the sum is 25.

The square root of 22404445 is about 4733.3333920188. Note that the first 4 decimals coincide. The cubic root of 22404445 is about 281.9105940273.

Adding to 22404445 its reverse (54440422), we get a palindrome (76844867).

The spelling of 22404445 in words is "twenty-two million, four hundred four thousand, four hundred forty-five".