40020244242440 has 64 divisors (see below), whose sum is σ = 112264581260160. Its totient is φ = 12473842360320.

The previous prime is 40020244242421. The next prime is 40020244242443. The reversal of 40020244242440 is 4424244202004.

It is a junction number, because it is equal to n+sod(n) for n = 40020244242397 and 40020244242406.

It is not an unprimeable number, because it can be changed into a prime (40020244242443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6496789817 + ... + 6496795976.

It is an arithmetic number, because the mean of its divisors is an integer number (1754134082190).

Almost surely, 2^{40020244242440} is an apocalyptic number.

40020244242440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40020244242440 is an abundant number, since it is smaller than the sum of its proper divisors (72244337017720).

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

40020244242440 is a wasteful number, since it uses less digits than its factorization.

40020244242440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12993585822 (or 12993585818 counting only the distinct ones).

The product of its (nonzero) digits is 65536, while the sum is 32.

Adding to 40020244242440 its reverse (4424244202004), we get a palindrome (44444488444444).

The spelling of 40020244242440 in words is "forty trillion, twenty billion, two hundred forty-four million, two hundred forty-two thousand, four hundred forty".