1387638264376 has 96 divisors (see below), whose sum is σ = 3220694006400. Its totient is φ = 548809672320.

The previous prime is 1387638264347. The next prime is 1387638264379. The reversal of 1387638264376 is 6734628367831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1387638264379) 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 23 ways as a sum of consecutive naturals, for example, 39835495 + ... + 39870313.

It is an arithmetic number, because the mean of its divisors is an integer number (33548895900).

Almost surely, 2^{1387638264376} 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 1387638264376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1610347003200).

1387638264376 is an abundant number, since it is smaller than the sum of its proper divisors (1833055742024).

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

1387638264376 is a wasteful number, since it uses less digits than its factorization.

1387638264376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39069 (or 39052 counting only the distinct ones).

The product of its digits is 146313216, while the sum is 64.

The spelling of 1387638264376 in words is "one trillion, three hundred eighty-seven billion, six hundred thirty-eight million, two hundred sixty-four thousand, three hundred seventy-six".