3979854851238 has 192 divisors, whose sum is σ = 10772158924800. Its totient is φ = 1036580613120.

The previous prime is 3979854851213. The next prime is 3979854851353. The reversal of 3979854851238 is 8321584589793.

3979854851238 is a `hidden beast` number, since 3 + 9 + 7 + 9 + 8 + 548 + 51 + 23 + 8 = 666.

It is a super-2 number, since 2×3979854851238² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 6887523 + ... + 7442961.

It is an arithmetic number, because the mean of its divisors is an integer number (56104994400).

Almost surely, 2^{3979854851238} is an apocalyptic number.

3979854851238 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 3979854851238, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5386079462400).

3979854851238 is an abundant number, since it is smaller than the sum of its proper divisors (6792304073562).

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

3979854851238 is a wasteful number, since it uses less digits than its factorization.

3979854851238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555587 (or 555584 counting only the distinct ones).

The product of its digits is 522547200, while the sum is 72.

The spelling of 3979854851238 in words is "three trillion, nine hundred seventy-nine billion, eight hundred fifty-four million, eight hundred fifty-one thousand, two hundred thirty-eight".