422623645444 has 144 divisors (see below), whose sum is σ = 1013720109696. Its totient is φ = 151989062400.

The previous prime is 422623645441. The next prime is 422623645447. The reversal of 422623645444 is 444546326224.

It is an interprime number because it is at equal distance from previous prime (422623645441) and next prime (422623645447).

It is a super-2 number, since 2×422623645444² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 422623645394 and 422623645403.

It is not an unprimeable number, because it can be changed into a prime (422623645441) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9591624 + ... + 9635584.

It is an arithmetic number, because the mean of its divisors is an integer number (7039722984).

Almost surely, 2^422623645444 is an apocalyptic number.

422623645444 is a gapful number since it is divisible by the number (44) 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 422623645444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (506860054848).

422623645444 is an abundant number, since it is smaller than the sum of its proper divisors (591096464252).

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

422623645444 is a wasteful number, since it uses less digits than its factorization.

422623645444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44024 (or 43994 counting only the distinct ones).

The product of its digits is 4423680, while the sum is 46.

The spelling of 422623645444 in words is "four hundred twenty-two billion, six hundred twenty-three million, six hundred forty-five thousand, four hundred forty-four".