423340420240 has 160 divisors (see below), whose sum is σ = 1009168444800. Its totient is φ = 165105008640.

The previous prime is 423340420219. The next prime is 423340420241. The reversal of 423340420240 is 42024043324.

It is a happy number.

It is a super-2 number, since 2×423340420240² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 423340420199 and 423340420208.

It is not an unprimeable number, because it can be changed into a prime (423340420241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 492828931 + ... + 492829789.

It is an arithmetic number, because the mean of its divisors is an integer number (6307302780).

Almost surely, 2^423340420240 is an apocalyptic number.

423340420240 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 423340420240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (504584222400).

423340420240 is an abundant number, since it is smaller than the sum of its proper divisors (585828024560).

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

423340420240 is a wasteful number, since it uses less digits than its factorization.

423340420240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1665 (or 1659 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 28.

Adding to 423340420240 its reverse (42024043324), we get a palindrome (465364463564).

The spelling of 423340420240 in words is "four hundred twenty-three billion, three hundred forty million, four hundred twenty thousand, two hundred forty".