422344423040 has 128 divisors (see below), whose sum is σ = 1021067752320. Its totient is φ = 167040921600.

The previous prime is 422344423019. The next prime is 422344423043. The reversal of 422344423040 is 40324443224.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 422344422988 and 422344423006.

It is not an unprimeable number, because it can be changed into a prime (422344423043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20540765 + ... + 20561315.

It is an arithmetic number, because the mean of its divisors is an integer number (7977091815).

Almost surely, 2^422344423040 is an apocalyptic number.

422344423040 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 422344423040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (510533876160).

422344423040 is an abundant number, since it is smaller than the sum of its proper divisors (598723329280).

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

422344423040 is a wasteful number, since it uses less digits than its factorization.

422344423040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20930 (or 20918 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 32.

Adding to 422344423040 its reverse (40324443224), we get a palindrome (462668866264).

The spelling of 422344423040 in words is "four hundred twenty-two billion, three hundred forty-four million, four hundred twenty-three thousand, forty".