340402002043240 has 128 divisors (see below), whose sum is σ = 799068358972800. Its totient is φ = 130428787507200.

The previous prime is 340402002043219. The next prime is 340402002043241. The reversal of 340402002043240 is 42340200204043.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 340402002043199 and 340402002043208.

It is not an unprimeable number, because it can be changed into a prime (340402002043241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2396440 + ... + 26202040.

It is an arithmetic number, because the mean of its divisors is an integer number (6242721554475).

Almost surely, 2^{340402002043240} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 340402002043240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (399534179486400).

340402002043240 is an abundant number, since it is smaller than the sum of its proper divisors (458666356929560).

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

340402002043240 is a wasteful number, since it uses less digits than its factorization.

340402002043240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23805827 (or 23805823 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 28.

Adding to 340402002043240 its reverse (42340200204043), we get a palindrome (382742202247283).

The spelling of 340402002043240 in words is "three hundred forty trillion, four hundred two billion, two million, forty-three thousand, two hundred forty".