1002420035440 has 80 divisors (see below), whose sum is σ = 2344127778720. Its totient is φ = 398646420480.

The previous prime is 1002420035413. The next prime is 1002420035453. The reversal of 1002420035440 is 445300242001.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75825151 + ... + 75838369.

It is an arithmetic number, because the mean of its divisors is an integer number (29301597234).

Almost surely, 2^{1002420035440} is an apocalyptic number.

1002420035440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1002420035440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1172063889360).

1002420035440 is an abundant number, since it is smaller than the sum of its proper divisors (1341707743280).

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

1002420035440 is a wasteful number, since it uses less digits than its factorization.

1002420035440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18650 (or 18644 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

Adding to 1002420035440 its reverse (445300242001), we get a palindrome (1447720277441).

The spelling of 1002420035440 in words is "one trillion, two billion, four hundred twenty million, thirty-five thousand, four hundred forty".