1244023420240 has 40 divisors (see below), whose sum is σ = 2962899690408. Its totient is φ = 485472552960.

The previous prime is 1244023420231. The next prime is 1244023420243. The reversal of 1244023420240 is 420243204421.

It can be written as a sum of positive squares in 4 ways, for example, as 11692529424 + 1232330890816 = 108132^2 + 1110104^2 .

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 = 1244023420199 and 1244023420208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1244023420243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 189634437 + ... + 189640996.

Almost surely, 2^{1244023420240} is an apocalyptic number.

1244023420240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1244023420240 is an abundant number, since it is smaller than the sum of its proper divisors (1718876270168).

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

1244023420240 is a wasteful number, since it uses less digits than its factorization.

1244023420240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379275487 (or 379275481 counting only the distinct ones).

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

Adding to 1244023420240 its reverse (420243204421), we get a palindrome (1664266624661).

The spelling of 1244023420240 in words is "one trillion, two hundred forty-four billion, twenty-three million, four hundred twenty thousand, two hundred forty".