1822644544 has 56 divisors (see below), whose sum is σ = 4139102720. Its totient is φ = 780074496.

The previous prime is 1822644541. The next prime is 1822644563. The reversal of 1822644544 is 4454462281.

It is a tau number, because it is divible by the number of its divisors (56).

It is a junction number, because it is equal to n+sod(n) for n = 1822644497 and 1822644506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1822644541) 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 in 7 ways as a sum of consecutive naturals, for example, 390577 + ... + 395215.

Almost surely, 2^1822644544 is an apocalyptic number.

1822644544 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1822644544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2069551360).

1822644544 is an abundant number, since it is smaller than the sum of its proper divisors (2316458176).

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

1822644544 is an equidigital number, since it uses as much as digits as its factorization.

1822644544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5535 (or 5525 counting only the distinct ones).

The product of its digits is 245760, while the sum is 40.

The square root of 1822644544 is about 42692.4412981970. The cubic root of 1822644544 is about 1221.5202190239.

The spelling of 1822644544 in words is "one billion, eight hundred twenty-two million, six hundred forty-four thousand, five hundred forty-four".