420442312240 has 40 divisors (see below), whose sum is σ = 1035030048480. Its totient is φ = 158284164096.

The previous prime is 420442312237. The next prime is 420442312253. The reversal of 420442312240 is 42213244024.

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 = 420442312199 and 420442312208.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154573020 + ... + 154575739.

It is an arithmetic number, because the mean of its divisors is an integer number (25875751212).

Almost surely, 2^420442312240 is an apocalyptic number.

420442312240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

420442312240 is an abundant number, since it is smaller than the sum of its proper divisors (614587736240).

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

420442312240 is a wasteful number, since it uses less digits than its factorization.

420442312240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309148789 (or 309148783 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 420442312240 its reverse (42213244024), we get a palindrome (462655556264).

The spelling of 420442312240 in words is "four hundred twenty billion, four hundred forty-two million, three hundred twelve thousand, two hundred forty".