3861143520 has 384 divisors, whose sum is σ = 14275699200. Its totient is φ = 868589568.

The previous prime is 3861143519. The next prime is 3861143543. The reversal of 3861143520 is 253411683.

3861143520 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3437679 + ... + 3438801.

It is an arithmetic number, because the mean of its divisors is an integer number (37176300).

Almost surely, 2^3861143520 is an apocalyptic number.

3861143520 is a gapful number since it is divisible by the number (30) 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 3861143520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7137849600).

3861143520 is an abundant number, since it is smaller than the sum of its proper divisors (10414555680).

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

3861143520 is a wasteful number, since it uses less digits than its factorization.

3861143520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1202 (or 1194 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 3861143520 is about 62138.1003893746. The cubic root of 3861143520 is about 1568.8158975720.

The spelling of 3861143520 in words is "three billion, eight hundred sixty-one million, one hundred forty-three thousand, five hundred twenty".