1387435881000 has 128 divisors (see below), whose sum is σ = 4661784691200. Its totient is φ = 341522668800.

The previous prime is 1387435880977. The next prime is 1387435881011. The reversal of 1387435881000 is 1885347831.

It is a happy number.

It is a super-2 number, since 2×1387435881000² (a number of 25 digits) contains 22 as substring.

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, 17748640 + ... + 17826639.

It is an arithmetic number, because the mean of its divisors is an integer number (36420192900).

Almost surely, 2^{1387435881000} is an apocalyptic number.

1387435881000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1387435881000 is an abundant number, since it is smaller than the sum of its proper divisors (3274348810200).

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

1387435881000 is a wasteful number, since it uses less digits than its factorization.

1387435881000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35575316 (or 35575302 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 48.

The spelling of 1387435881000 in words is "one trillion, three hundred eighty-seven billion, four hundred thirty-five million, eight hundred eighty-one thousand".