420344040042 has 48 divisors (see below), whose sum is σ = 919395110088. Its totient is φ = 138790195200.

The previous prime is 420344040041. The next prime is 420344040073. The reversal of 420344040042 is 240040443024.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 263948310081 + 156395729961 = 513759^2 + 395469^2 .

It is a super-2 number, since 2×420344040042² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 420344039988 and 420344040015.

It is not an unprimeable number, because it can be changed into a prime (420344040041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 549792 + ... + 1069092.

Almost surely, 2^420344040042 is an apocalyptic number.

420344040042 is an abundant number, since it is smaller than the sum of its proper divisors (499051070046).

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

420344040042 is a wasteful number, since it uses less digits than its factorization.

420344040042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519735 (or 519732 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 27.

Adding to 420344040042 its reverse (240040443024), we get a palindrome (660384483066).

The spelling of 420344040042 in words is "four hundred twenty billion, three hundred forty-four million, forty thousand, forty-two".