22404391 has 2 divisors, whose sum is σ = 22404392. Its totient is φ = 22404390.

The previous prime is 22404367. The next prime is 22404427. The reversal of 22404391 is 19340422.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22404391 - 2⁹ = 22403879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22404341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11202195 + 11202196.

It is an arithmetic number, because the mean of its divisors is an integer number (11202196).

Almost surely, 2^22404391 is an apocalyptic number.

22404391 is a deficient number, since it is larger than the sum of its proper divisors (1).

22404391 is an equidigital number, since it uses as much as digits as its factorization.

22404391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 22404391 is about 4733.3276877901. The cubic root of 22404391 is about 281.9103675367.

The spelling of 22404391 in words is "twenty-two million, four hundred four thousand, three hundred ninety-one".