3843863856 has 320 divisors, whose sum is σ = 13392000000. Its totient is φ = 1031159808.

The previous prime is 3843863851. The next prime is 3843863909. The reversal of 3843863856 is 6583683483.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (3843863851) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8560720 + ... + 8561168.

It is an arithmetic number, because the mean of its divisors is an integer number (41850000).

Almost surely, 2^3843863856 is an apocalyptic number.

3843863856 is a gapful number since it is divisible by the number (36) 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 3843863856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6696000000).

3843863856 is an abundant number, since it is smaller than the sum of its proper divisors (9548136144).

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

3843863856 is a wasteful number, since it uses less digits than its factorization.

3843863856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641 (or 629 counting only the distinct ones).

The product of its digits is 9953280, while the sum is 54.

The square root of 3843863856 is about 61998.9020547945. The cubic root of 3843863856 is about 1566.4721055708.

The spelling of 3843863856 in words is "three billion, eight hundred forty-three million, eight hundred sixty-three thousand, eight hundred fifty-six".