22404146 has 4 divisors (see below), whose sum is σ = 33606222. Its totient is φ = 11202072.

The previous prime is 22404143. The next prime is 22404149. The reversal of 22404146 is 64140422.

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

It is an interprime number because it is at equal distance from previous prime (22404143) and next prime (22404149).

It can be written as a sum of positive squares in only one way, i.e., 16933225 + 5470921 = 4115^2 + 2339^2 .

It is not an unprimeable number, because it can be changed into a prime (22404143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5601035 + ... + 5601038.

Almost surely, 2^22404146 is an apocalyptic number.

22404146 is a deficient number, since it is larger than the sum of its proper divisors (11202076).

22404146 is a wasteful number, since it uses less digits than its factorization.

22404146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11202075.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 22404146 is about 4733.3018074067. The cubic root of 22404146 is about 281.9093399362.

Adding to 22404146 its reverse (64140422), we get a palindrome (86544568).

The spelling of 22404146 in words is "twenty-two million, four hundred four thousand, one hundred forty-six".