3887239512856 has 128 divisors (see below), whose sum is σ = 8515653120000. Its totient is φ = 1629011704320.

The previous prime is 3887239512847. The next prime is 3887239512881. The reversal of 3887239512856 is 6582159327883.

It is a super-2 number, since 2×3887239512856² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3887239512791 and 3887239512800.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1500284121 + ... + 1500286711.

It is an arithmetic number, because the mean of its divisors is an integer number (66528540000).

Almost surely, 2^{3887239512856} 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 3887239512856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4257826560000).

3887239512856 is an abundant number, since it is smaller than the sum of its proper divisors (4628413607144).

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

3887239512856 is a wasteful number, since it uses less digits than its factorization.

3887239512856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4169 (or 4165 counting only the distinct ones).

The product of its digits is 174182400, while the sum is 67.

The spelling of 3887239512856 in words is "three trillion, eight hundred eighty-seven billion, two hundred thirty-nine million, five hundred twelve thousand, eight hundred fifty-six".