420442040240 has 40 divisors (see below), whose sum is σ = 1035029378880. Its totient is φ = 158284061696.

The previous prime is 420442040237. The next prime is 420442040309. The reversal of 420442040240 is 42040244024.

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

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, 154572920 + ... + 154575639.

It is an arithmetic number, because the mean of its divisors is an integer number (25875734472).

Almost surely, 2^420442040240 is an apocalyptic number.

420442040240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

420442040240 is an abundant number, since it is smaller than the sum of its proper divisors (614587338640).

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

420442040240 is a wasteful number, since it uses less digits than its factorization.

420442040240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309148589 (or 309148583 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 26.

Adding to 420442040240 its reverse (42040244024), we get a palindrome (462482284264).

The spelling of 420442040240 in words is "four hundred twenty billion, four hundred forty-two million, forty thousand, two hundred forty".