1308837728640 has 256 divisors, whose sum is σ = 4499836830720. Its totient is φ = 321673519104.

The previous prime is 1308837728633. The next prime is 1308837728651. The reversal of 1308837728640 is 468277388031.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16108597 + ... + 16189643.

It is an arithmetic number, because the mean of its divisors is an integer number (17577487620).

Almost surely, 2^{1308837728640} is an apocalyptic number.

1308837728640 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 1308837728640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2249918415360).

1308837728640 is an abundant number, since it is smaller than the sum of its proper divisors (3190999102080).

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

1308837728640 is a wasteful number, since it uses less digits than its factorization.

1308837728640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81729 (or 81717 counting only the distinct ones).

The product of its (nonzero) digits is 10838016, while the sum is 57.

The spelling of 1308837728640 in words is "one trillion, three hundred eight billion, eight hundred thirty-seven million, seven hundred twenty-eight thousand, six hundred forty".