22440304 has 10 divisors (see below), whose sum is σ = 43478120. Its totient is φ = 11220144.

The previous prime is 22440293. The next prime is 22440307. The reversal of 22440304 is 40304422.

It is a super-2 number, since 2×22440304² = 1007134487224832, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22440307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 701244 + ... + 701275.

It is an arithmetic number, because the mean of its divisors is an integer number (4347812).

Almost surely, 2^22440304 is an apocalyptic number.

It is an amenable number.

22440304 is a deficient number, since it is larger than the sum of its proper divisors (21037816).

22440304 is a wasteful number, since it uses less digits than its factorization.

22440304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1402527 (or 1402521 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 22440304 is about 4737.1198000473. The cubic root of 22440304 is about 282.0609160357.

Adding to 22440304 its reverse (40304422), we get a palindrome (62744726).

The spelling of 22440304 in words is "twenty-two million, four hundred forty thousand, three hundred four".