22304144 has 10 divisors (see below), whose sum is σ = 43214310. Its totient is φ = 11152064.

The previous prime is 22304141. The next prime is 22304167. The reversal of 22304144 is 44140322.

It can be written as a sum of positive squares in only one way, i.e., 21049744 + 1254400 = 4588^2 + 1120^2 .

It is not an unprimeable number, because it can be changed into a prime (22304141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 696989 + ... + 697020.

It is an arithmetic number, because the mean of its divisors is an integer number (4321431).

Almost surely, 2^22304144 is an apocalyptic number.

It is an amenable number.

22304144 is a deficient number, since it is larger than the sum of its proper divisors (20910166).

22304144 is a wasteful number, since it uses less digits than its factorization.

22304144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1394017 (or 1394011 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 22304144 is about 4722.7263312625. The cubic root of 22304144 is about 281.4892756195.

Adding to 22304144 its reverse (44140322), we get a palindrome (66444466).

The spelling of 22304144 in words is "twenty-two million, three hundred four thousand, one hundred forty-four".