22404401 has 4 divisors (see below), whose sum is σ = 23583600. Its totient is φ = 21225204.

The previous prime is 22404391. The next prime is 22404427. The reversal of 22404401 is 10440422.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10440422 = 2 ⋅5220211.

It is not a de Polignac number, because 22404401 - 2¹⁰ = 22403377 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22404401.

It is not an unprimeable number, because it can be changed into a prime (22403401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 589571 + ... + 589608.

It is an arithmetic number, because the mean of its divisors is an integer number (5895900).

Almost surely, 2^22404401 is an apocalyptic number.

It is an amenable number.

22404401 is a deficient number, since it is larger than the sum of its proper divisors (1179199).

22404401 is a wasteful number, since it uses less digits than its factorization.

22404401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1179198.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 22404401 is about 4733.3287441292. The cubic root of 22404401 is about 281.9104094795.

Adding to 22404401 its reverse (10440422), we get a palindrome (32844823).

The spelling of 22404401 in words is "twenty-two million, four hundred four thousand, four hundred one".