422543440 has 80 divisors (see below), whose sum is σ = 1076556096. Its totient is φ = 152960000.

The previous prime is 422543411. The next prime is 422543453. The reversal of 422543440 is 44345224.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 422543399 and 422543408.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 219924 + ... + 221836.

Almost surely, 2^422543440 is an apocalyptic number.

422543440 is a gapful number since it is divisible by the number (40) 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 422543440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (538278048).

422543440 is an abundant number, since it is smaller than the sum of its proper divisors (654012656).

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

422543440 is a wasteful number, since it uses less digits than its factorization.

422543440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2188 (or 2182 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 28.

The square root of 422543440 is about 20555.8614511774. The cubic root of 422543440 is about 750.3959035696.

Adding to 422543440 its reverse (44345224), we get a palindrome (466888664).

The spelling of 422543440 in words is "four hundred twenty-two million, five hundred forty-three thousand, four hundred forty".