22400000644440 has 64 divisors (see below), whose sum is σ = 67229258312160. Its totient is φ = 5970732938240.

The previous prime is 22400000644391. The next prime is 22400000644501. The reversal of 22400000644440 is 4444600000422.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 22400000644398 and 22400000644407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40357071 + ... + 40908350.

Almost surely, 2^{22400000644440} is an apocalyptic number.

22400000644440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22400000644440 is an abundant number, since it is smaller than the sum of its proper divisors (44829257667720).

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

22400000644440 is a wasteful number, since it uses less digits than its factorization.

22400000644440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81267732 (or 81267728 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 30.

Adding to 22400000644440 its reverse (4444600000422), we get a palindrome (26844600644862).

The spelling of 22400000644440 in words is "twenty-two trillion, four hundred billion, six hundred forty-four thousand, four hundred forty".