420522540240 has 160 divisors (see below), whose sum is σ = 1436792789376. Its totient is φ = 100893818880.

The previous prime is 420522540233. The next prime is 420522540247. The reversal of 420522540240 is 42045225024.

It is an interprime number because it is at equal distance from previous prime (420522540233) and next prime (420522540247).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 420522540198 and 420522540207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420522540247) 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, 564997 + ... + 1077156.

Almost surely, 2^420522540240 is an apocalyptic number.

420522540240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

420522540240 is an abundant number, since it is smaller than the sum of its proper divisors (1016270249136).

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

420522540240 is a wasteful number, since it uses less digits than its factorization.

420522540240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1642277 (or 1642271 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 30.

Adding to 420522540240 its reverse (42045225024), we get a palindrome (462567765264).

The spelling of 420522540240 in words is "four hundred twenty billion, five hundred twenty-two million, five hundred forty thousand, two hundred forty".