1244652386040 has 768 divisors, whose sum is σ = 4872738124800. Its totient is φ = 279864336384.

The previous prime is 1244652386011. The next prime is 1244652386129. The reversal of 1244652386040 is 406832564421.

1244652386040 is a `hidden beast` number, since 1 + 2 + 4 + 4 + 6 + 5 + 2 + 38 + 604 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 2445289306 + ... + 2445289814.

It is an arithmetic number, because the mean of its divisors is an integer number (6344711100).

Almost surely, 2^{1244652386040} is an apocalyptic number.

1244652386040 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 1244652386040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2436369062400).

1244652386040 is an abundant number, since it is smaller than the sum of its proper divisors (3628085738760).

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

1244652386040 is a wasteful number, since it uses less digits than its factorization.

1244652386040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1058 (or 1042 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 45.

The spelling of 1244652386040 in words is "one trillion, two hundred forty-four billion, six hundred fifty-two million, three hundred eighty-six thousand, forty".