420207052240 has 40 divisors (see below), whose sum is σ = 985627270728. Its totient is φ = 166595358720.

The previous prime is 420207052229. The next prime is 420207052241. The reversal of 420207052240 is 42250702024.

It can be written as a sum of positive squares in 4 ways, for example, as 16051876416 + 404155175824 = 126696^2 + 635732^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 420207052199 and 420207052208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420207052241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23232501 + ... + 23250580.

Almost surely, 2^420207052240 is an apocalyptic number.

420207052240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

420207052240 is an abundant number, since it is smaller than the sum of its proper divisors (565420218488).

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

420207052240 is a wasteful number, since it uses less digits than its factorization.

420207052240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46483207 (or 46483201 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 28.

Adding to 420207052240 its reverse (42250702024), we get a palindrome (462457754264).

The spelling of 420207052240 in words is "four hundred twenty billion, two hundred seven million, fifty-two thousand, two hundred forty".