22444400240 has 20 divisors (see below), whose sum is σ = 52183230744. Its totient is φ = 8977760064.

The previous prime is 22444400233. The next prime is 22444400249. The reversal of 22444400240 is 4200444422.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×22444400240² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22444400249) 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, 140277422 + ... + 140277581.

Almost surely, 2^22444400240 is an apocalyptic number.

22444400240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22444400240 is an abundant number, since it is smaller than the sum of its proper divisors (29738830504).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22444400240 is a wasteful number, since it uses less digits than its factorization.

22444400240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280555016 (or 280555010 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 26.

Adding to 22444400240 its reverse (4200444422), we get a palindrome (26644844662).

The spelling of 22444400240 in words is "twenty-two billion, four hundred forty-four million, four hundred thousand, two hundred forty".