420227135240 has 128 divisors (see below), whose sum is σ = 1065129246720. Its totient is φ = 147826425600.

The previous prime is 420227135231. The next prime is 420227135297. The reversal of 420227135240 is 42531722024.

It is a junction number, because it is equal to n+sod(n) for n = 420227135197 and 420227135206.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63600017 + ... + 63606623.

It is an arithmetic number, because the mean of its divisors is an integer number (8321322240).

Almost surely, 2^420227135240 is an apocalyptic number.

420227135240 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 420227135240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (532564623360).

420227135240 is an abundant number, since it is smaller than the sum of its proper divisors (644902111480).

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

420227135240 is a wasteful number, since it uses less digits than its factorization.

420227135240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11323 (or 11319 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 32.

Adding to 420227135240 its reverse (42531722024), we get a palindrome (462758857264).

The spelling of 420227135240 in words is "four hundred twenty billion, two hundred twenty-seven million, one hundred thirty-five thousand, two hundred forty".