1387662993880 has 64 divisors (see below), whose sum is σ = 3207842598240. Its totient is φ = 539858644992.

The previous prime is 1387662993851. The next prime is 1387662993949. The reversal of 1387662993880 is 883992667831.

It is a Smith number, since the sum of its digits (70) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3755919 + ... + 4108801.

Almost surely, 2^{1387662993880} is an apocalyptic number.

1387662993880 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 1387662993880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1603921299120).

1387662993880 is an abundant number, since it is smaller than the sum of its proper divisors (1820179604360).

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

1387662993880 is a wasteful number, since it uses less digits than its factorization.

1387662993880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355588 (or 355584 counting only the distinct ones).

The product of its (nonzero) digits is 188116992, while the sum is 70.

The spelling of 1387662993880 in words is "one trillion, three hundred eighty-seven billion, six hundred sixty-two million, nine hundred ninety-three thousand, eight hundred eighty".