3861280206 has 384 divisors, whose sum is σ = 11271536640. Its totient is φ = 965779200.

The previous prime is 3861280147. The next prime is 3861280207. The reversal of 3861280206 is 6020821683.

3861280206 is a `hidden beast` number, since 38 + 612 + 8 + 0 + 2 + 0 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3861280207) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 82154875 + ... + 82154921.

It is an arithmetic number, because the mean of its divisors is an integer number (29352960).

Almost surely, 2^3861280206 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3861280206, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5635768320).

3861280206 is an abundant number, since it is smaller than the sum of its proper divisors (7410256434).

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

3861280206 is a wasteful number, since it uses less digits than its factorization.

3861280206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162 (or 150 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 3861280206 is about 62139.2002362438. The cubic root of 3861280206 is about 1568.8344095870.

The spelling of 3861280206 in words is "three billion, eight hundred sixty-one million, two hundred eighty thousand, two hundred six".