22406347 has 4 divisors (see below), whose sum is σ = 23380560. Its totient is φ = 21432136.

The previous prime is 22406327. The next prime is 22406359. The reversal of 22406347 is 74360422.

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

It is not a de Polignac number, because 22406347 - 2¹¹ = 22404299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22406327) 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, 487072 + ... + 487117.

It is an arithmetic number, because the mean of its divisors is an integer number (5845140).

Almost surely, 2^22406347 is an apocalyptic number.

22406347 is a deficient number, since it is larger than the sum of its proper divisors (974213).

22406347 is an equidigital number, since it uses as much as digits as its factorization.

22406347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 974212.

The product of its (nonzero) digits is 8064, while the sum is 28.

The square root of 22406347 is about 4733.5343032453. The cubic root of 22406347 is about 281.9185712951.

Adding to 22406347 its reverse (74360422), we get a palindrome (96766769).

The spelling of 22406347 in words is "twenty-two million, four hundred six thousand, three hundred forty-seven".